Smith v. Volkswagen Southtowne , 2022 UT 29 ( 2022 )


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    2022 UT 29
    IN THE
    SUPREME COURT OF THE STATE OF UTAH
    LOIS SMITH,
    Appellant & Cross Appellee,
    v.
    VOLKSWAGEN SOUTHTOWNE, INC.,
    Appellee & Cross Appellant.
    No. 20190382
    Heard February 10, 2021
    Filed June 30, 2022
    On Direct Appeal
    Third District, Salt Lake
    The Honorable Barry G. Lawrence
    No. 130908362
    Attorneys:1
    Michael A. Worel, Colin King, Ricky Shelton, Paul M. Simmons,
    Salt Lake City, for appellant and cross appellee
    Rodney R. Parker, Nathanael J. Mitchell, Salt Lake City,
    for appellee and cross appellant
    JUSTICE PETERSEN authored the opinion of the Court, in which
    CHIEF JUSTICE DURRANT, ASSOCIATE CHIEF JUSTICE LEE,
    JUSTICE HIMONAS, and JUSTICE PEARCE joined.
    JUSTICE HAGEN became a member of the Court on May 18, 2022,
    after oral argument in this matter, and accordingly did not
    participate.
    __________________________________________________________
    1 Attorneys for amici curiae: S. Spencer Brown, Axel Trumbo,
    Scarlet R. Smith, Salt Lake City, for Utah Defense Lawyers
    Association; Tracy H. Fowler, Salt Lake City, Alan J. Lazarus,
    San Francisco, CA, for Product Liability Advisory Council, Inc.
    
    Justice Himonas sat on this case and voted prior to his
    retirement on March 1, 2022.
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    JUSTICE PETERSEN, opinion of the Court:
    INTRODUCTION
    ¶1 Volkswagen SouthTowne (SouthTowne) sold Lois Smith
    a vehicle that was subject to a safety recall because of a defective
    fuel injection line. Shortly after buying the car, Smith drove it to
    Washington State to visit family. During the drive, she began
    smelling fumes and feeling sick. After seeing smoke coming from
    under the hood, she had the car towed to a Volkswagen
    dealership along the way. A mechanic found that the safety recall
    had not been performed on Smith‘s vehicle, and he observed that
    a cracked fuel line had sprayed diesel fuel throughout the engine
    compartment. Smith was later diagnosed with carbon monoxide
    poisoning. She filed negligence and strict liability claims against
    SouthTowne and other Volkswagen entities.
    ¶2 Smith prevailed at trial and the jury awarded her
    $2,700,000 in damages. SouthTowne then moved for judgment as
    a matter of law and a new trial. The district court granted
    SouthTowne‘s motions because it concluded Smith had failed to
    prove causation.
    ¶3 Smith now appeals the district court‘s reversal of the jury
    verdict in her favor. And although it prevailed post-trial,
    SouthTowne cross appeals, asserting that the district court
    incorrectly rejected some of the arguments it advanced in its post-
    trial motions.2 It also challenges some of the district court‘s
    __________________________________________________________
    2 As the prevailing party, it is not clear that all the arguments
    SouthTowne advances in its cross appeal should have been
    brought in that manner. Generally, if an appellee wishes to argue
    that the district court‘s ruling should be upheld for reasons other
    than those relied upon by the district court, but the appellee is not
    seeking to challenge the results of the judgment or to enlarge its
    rights or lessen the rights of its opponent in some way, then an
    appellee should present such arguments as alternative grounds
    for affirmance in its response brief rather than in a separate cross
    appeal. See State v. South, 
    924 P.2d 354
    , 355–57 (Utah 1996)
    (adopting the ―Langnes doctrine‖ and holding that a cross appeal
    is necessary only where there exists a challenge to the tangible
    result of a judgment or decision); Helf v. Chevron U.S.A. Inc.,
    
    2015 UT 81
    , ¶¶ 61–63, 
    361 P.3d 63
     (finding a cross appeal
    inappropriate where the appellee sought an affirmance of the
    (continued . . .)
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    Opinion of the Court
    evidentiary rulings, in the event that there is a new trial.
    ¶4 We reverse in part and affirm in part. We disagree with
    the district court‘s conclusion that Smith failed to prove the
    defective fuel injection line caused her to suffer carbon monoxide
    poisoning. But we affirm the district court‘s rulings rejecting the
    arguments SouthTowne attempts to revive in its cross appeal.
    Accordingly, we conclude that SouthTowne is not entitled to
    judgment as a matter of law or a new trial, and we order the jury‘s
    verdict to be reinstated.
    BACKGROUND3
    ¶5 In October 2011, Volkswagen‘s corporate office sent a
    ―Mandatory Stop Sale Order‖ and ―Safety Recall‖ to all of its
    dealerships, including SouthTowne. In the order, Volkswagen
    Corporate warned SouthTowne that certain Volkswagen cars had
    a defective fuel-injection line that could crack during operation
    and spray high-pressured fuel on the engine. Volkswagen ordered
    SouthTowne, ―effective immediately,‖ to quarantine the defective
    cars ―in a secure area where [they could not] be made available
    for sale, lease, trade, or demo use until the recall repair ha[d] been
    performed.‖
    ¶6 But one month later, SouthTowne sold one of the
    defective cars to Lois Smith. In December 2011, a few weeks after
    purchasing the defective Volkswagen, Smith drove the car from
    district court‘s judgment on alternative grounds, and did not seek
    to enlarge its rights or lessen the rights of its opponent under the
    judgment).
    Smith has not challenged any of SouthTowne‘s cross-appeal
    claims as procedurally improper. So we do not analyze this matter
    further. We make these observations only to clarify that when a
    party prevails below, it should file a cross appeal only where it
    seeks to challenge the tangible result of a judgment or decision, see
    South, 924 P.2d at 355–57, or seeks to enlarge its rights or lessen
    the rights of its opponent under the judgment, see Helf,
    
    2015 UT 81
    , ¶¶ 61–63.
    3  ―On appeal from a trial court‘s entry of a judgment [as a
    matter of law], we view the evidence and all reasonable inferences
    therefrom in a light most favorable to the party who prevailed at
    trial.‖ Gold Standard, Inc. v. Getty Oil Co., 
    915 P.2d 1060
    , 1061–62
    (Utah 1996) (citations omitted). We recite the facts accordingly.
    3
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    Salt Lake City to Washington State to visit family. At some point
    during this drive, Smith began smelling what she described as ―a
    gassy smell‖ and an ―engine smell.‖ Smith was initially
    unconcerned, because her stepfather had explained upon
    purchase of the vehicle that cars with diesel engines always ―smell
    bad‖ and had warned her that any diesel-related odor might take
    some time to get used to.
    ¶7 Soon, however, Smith began to feel ―extremely sick.‖ She
    developed a headache ―like [she]‘d never felt before,‖ she ―felt
    like [she] was on fire,‖ and she was ―sick to [her] stomach.‖ Smith
    also became ―seriously sleepy.‖
    ¶8 After experiencing these symptoms, Smith pulled off the
    highway for a break. She noticed ―a big cloud of smoke‖ coming
    from the engine. In reaction to the smoke, Smith had the vehicle
    towed to the nearest Volkswagen dealership.
    ¶9 At the dealership, a Volkswagen mechanic named
    Guadalupe Mejia discovered a defective fuel line. Mejia also
    observed that fuel had sprayed throughout the engine
    compartment. He observed somewhere ―between . . . a pint and a
    quart‖ of fuel on various parts of the engine, including where the
    engine houses the exhaust manifold and turbocharger, and
    another ―foot in diameter‖ of diesel fuel pooled underneath the
    car.
    ¶10 Smith stayed in a motel for a few days as she waited for
    the dealership to repair her vehicle. During this time, she
    continued to feel symptoms similar to those she had experienced
    while driving her vehicle. She ―just wanted to [] sleep‖ and
    ―didn‘t care about eat[ing].‖ Apart from attending church, during
    which she fell asleep more than once, Smith could recall getting
    up only once while awaiting the repairs.
    ¶11 Because her symptoms persisted, Smith eventually went
    to an emergency room after arriving in Washington. Although the
    E.R. doctor could not detect any lingering or concerning traces of
    carbon monoxide in Smith‘s blood, the doctor presumed, based on
    her symptoms and description of events, that Smith had suffered
    carbon monoxide poisoning. The doctor also treated her for an
    upper respiratory infection.
    ¶12 After Smith returned to Utah, her friends and co-workers
    noticed significant changes in her behavior. Smith‘s employer
    observed that she was having unprecedented problems with her
    speech, memory, job performance, writing, and ability to connect
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    Opinion of the Court
    with others. According to one supervisor, it was ―like somebody
    switched the switch and turned off the light‖ inside her.
    ¶13 Shortly after her return from Washington, Smith visited
    the clinic of her primary-care physician. The clinic noted that
    Smith was having ―difficulty talking‖ and that her ―words [were]
    jumbled and slurred.‖ Clinic notes also indicated that Smith was
    ―having a difficult time concentrating,‖ had a ―headache on the
    left side of her head,‖ and felt tired. And another physician noted
    that Smith was having ―problems with word-finding and speech.‖
    ¶14 Smith visited a specialist in October 2012, just under a
    year after her trip. This specialist, neurologist Dr. John Foley,
    noted a ―history of presumed carbon monoxide intoxication‖ from
    the year before. And based on Smith‘s reported history, he
    performed a neurological exam. Smith failed two of the tests. Dr.
    Foley‘s findings noted ―[p]robable carbon monoxide intoxication
    with subsequent residual neurological dysfunction,‖ as well as
    ―ongoing affective disorder, cognitive dysfunction, fatigue and
    decreased balance.‖ He recommended ―[f]urther neurological
    work-up, including [an] MRI of the brain.‖
    ¶15 One year after this first consultation, in November 2013,
    Smith visited another specialist in carbon monoxide poisoning,
    Dr. William Orrison. After ordering an MRI and reviewing the
    scans of Smith‘s brain, Dr. Orrison noted that Smith had suffered
    brain damage ―consistent with . . . the clinical history of carbon-
    monoxide exposure.‖
    Pre-Trial Litigation
    ¶16 Due to her injuries, Smith filed negligence and strict
    liability claims against Volkswagen AG, Volkswagen Group of
    America, Volkswagen de Mexico, and Volkswagen SouthTowne.4
    During the litigation, Smith retained several experts.
    ¶17 One of these experts was Peter Leiss. Leiss was to opine
    on two issues: (1) whether carbon monoxide could be generated
    by the alleged diesel fuel leak; and (2) if so, whether there was a
    passageway for the carbon monoxide to travel from the engine
    compartment into the passenger compartment. Leiss was a
    mechanical engineer with twenty years of experience in the
    __________________________________________________________
    4 Volkswagen AG, Volkswagen Group of America, and
    Volkswagen de Mexico were voluntarily dismissed from the case
    during trial.
    5
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    automotive industry, including with diesel engine vehicles and
    diesel fuel systems. He had no independent training in chemical
    engineering.
    ¶18 To form an opinion regarding whether carbon monoxide
    could have been produced by the diesel fuel leak in Smith‘s car,
    Leiss relied on a test conducted by a lab technician he worked
    with at Robson Forensics—a firm that employs about ―a hundred
    full-time experts.‖ The technician dropped two milliliters of diesel
    fuel onto a hot metal plate inside an enclosed, upside-down glass
    aquarium, while measuring the amount of carbon monoxide
    produced in parts per million (ppm) as the temperature of the hot
    plate rose. When the drops of diesel fuel hit the metal surface at a
    heat of 344 degrees Fahrenheit, the technician detected 295 ppm of
    carbon monoxide.
    ¶19 Smith also retained Dr. Lindell Weaver, a specialist in
    internal medicine, pulmonary critical care, and hyperbaric
    medicine with expertise in carbon monoxide poisoning. Dr.
    Weaver was to provide medical testimony about the extent of
    Smith‘s injuries and to opine on the cause of those injuries. Dr.
    Weaver based his conclusions on several factors, including his
    own experience in the field, his knowledge of the events
    surrounding Smith‘s alleged carbon-monoxide poisoning, his own
    interview with and physical examination of Smith, his evaluation
    of her brain scans, and the report created by Dr. Orrison, who
    passed away before trial and was therefore unavailable to testify.
    ¶20 Before trial, SouthTowne filed various motions in limine
    seeking to limit or exclude testimony from Smith‘s experts,
    including Leiss and Dr. Weaver.
    ¶21 With regard to Leiss, SouthTowne argued that he should
    not be permitted to opine that carbon monoxide was created in
    Smith‘s engine compartment based on the results of the lab test
    because the test was conducted in an enclosed glass aquarium
    that lacked airflow, and therefore did not replicate the conditions
    under Smith‘s hood on the day in question. SouthTowne also
    argued that Leiss should not be allowed to opine on the
    concentration of carbon monoxide in Smith‘s passenger
    compartment. And it argued that Leiss should not be allowed to
    opine that the leaking fuel caused Smith to suffer carbon
    monoxide poisoning, because Leiss was not a medical doctor. The
    district court denied the motion without prejudice, stating it
    would ―assess [Leiss‘s] opinions at trial‖ and noting that the court
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    Opinion of the Court
    had a concern about whether Leiss could ―quantify the amount of
    [carbon monoxide] in the passenger compartment.‖
    ¶22 With regard to Dr. Weaver, SouthTowne argued in
    relevant part that Dr. Weaver‘s opinion that Smith suffered
    carbon monoxide poisoning during her drive should be excluded
    because he ―appear[ed] to base‖ that opinion on an unreliable
    differential diagnosis.5 The district court also denied this motion
    without prejudice, but it noted that it was concerned about Dr.
    Weaver‘s ―ability to identify the source of . . . Smith‘s alleged
    [carbon monoxide] poisoning.‖
    Trial
    ¶23 The case proceeded to trial. During her case in chief,
    Smith called Leiss as an expert witness. Smith offered the results
    of the lab test into evidence, and they were admitted without
    objection. Leiss explained that the test had measured 295 ppm of
    carbon monoxide when drops of diesel fuel hit the metal surface
    at a heat of 344 degrees Fahrenheit. He then testified that parts of
    the vehicle‘s engine could reach temperatures beyond 344 degrees
    Fahrenheit. Leiss had read the deposition of Volkswagen
    mechanic Mejia, who saw between a pint and a quart of diesel fuel
    pooled on Smith‘s engine, including on the turbocharger and
    exhaust manifold. And he testified that during driving conditions
    like Smith‘s drive to Washington, the turbocharger and exhaust
    manifold can reach between 500 and 700 degrees Fahrenheit. He
    also testified that these parts of the engine receive less air flow
    due to their location. On this basis, Leiss opined that the diesel
    fuel leaking from the defective fuel line could have produced
    carbon monoxide when it came in contact with these extremely
    hot surfaces. And he further opined that carbon monoxide created
    in the engine compartment could travel to the passenger
    compartment.
    ¶24 Smith also called Dr. Weaver as an expert witness.
    Dr. Weaver testified based on objective medical tests, such as an
    __________________________________________________________
    5 ―‗Differential diagnosis‘ refers to the process by which a
    physician ‗rule[s] in‘ all scientifically plausible causes of the
    plaintiff‘s injury . . . [and] then ‗rules out‘ the least plausible
    causes of injury [,] until the most likely cause remains.‖ Hollander
    v. Sandoz Pharms. Corp., 
    289 F.3d 1193
    , 1209 (10th Cir. 2002) (first
    alteration in original) (citation omitted) (internal quotation marks
    omitted).
    7
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    MRI scan of Smith‘s brain, that Smith had in fact suffered carbon
    monoxide poisoning.6 And after eliminating other potential
    causes, Dr. Weaver opined that Smith had been poisoned by
    carbon monoxide while driving her Volkswagen from Utah to
    Washington in December 2011.
    ¶25 In response to the expert testimony put on by Smith,
    SouthTowne introduced several experts at trial during its case in
    chief. This included two chemical engineers: Dr. Geoffrey Silcox
    and John Schumacher. Like Leiss, Dr. Silcox and Schumacher had
    conducted experiments prior to trial to determine the temperature
    at which diesel fuel would produce carbon monoxide in the
    absence of combustion. But while Leiss‘s test had been conducted
    in an enclosed space, the tests conducted by Dr. Silcox and
    Schumacher were intended to replicate the airflow encountered
    by the Volkswagen engine during Smith‘s drive to Washington.
    ¶26 At trial, Dr. Silcox testified that carbon monoxide can
    autogenerate at 469 degrees Fahrenheit in an enclosed space and
    at 869 degrees Fahrenheit on a flat surface. He also testified about
    the results of his test, which had introduced airflow into the
    equation. Dr. Silcox‘s test involved dropping diesel fuel onto a
    metal surface calibrated to various temperatures inside a five-
    gallon plastic bucket with a carbon-monoxide meter. Outside air
    was piped through the bucket with an air compressor. Dr. Silcox
    did not detect any carbon monoxide, but he admitted he had not
    tested temperatures over 480 degrees Fahrenheit because his
    bucket had started to melt. During cross-examination, Silcox
    conceded that ―it‘s possible‖ for diesel fuel leaking on an engine
    to produce carbon monoxide.
    ¶27 Schumacher testified that he agreed with Dr. Silcox‘s
    testimony about the temperatures at which diesel fuel can
    produce carbon monoxide when heated in an enclosed space or
    __________________________________________________________
    6 We use ―objective‖ here in the sense of ―objective medical
    evidence‖ as opposed to ―subjective medical evidence.‖ For
    example, the Social Security Administration considers ―objective
    medical evidence‖ to be ―‗evidence obtained from the application
    of medically acceptable clinical and laboratory diagnostic
    techniques, such as evidence of reduced joint motion, muscle
    spasm, sensory deficit or motor disruption.‘‖ Consideration of
    objective medical evidence, 3 SOC. SEC. LAW & PRAC. § 36:25
    (referencing 
    20 C.F.R. § 404.1529
    (c)(2)).
    8
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    Opinion of the Court
    on a flat surface. He also testified about the results of his test,
    which, like Dr. Silcox‘s, attempted to account for the influence of
    airflow. Schumacher positioned a copper tube above a metal
    surface, which was set to various temperatures, to capture vapor
    produced when he dropped diesel fuel onto the surface. The
    distance between the copper tube and the metal surface was
    meant to replicate airflow into the car‘s engine compartment. A
    carbon monoxide meter at the top of the cylinder detected carbon
    monoxide when the surface was calibrated to 657 degrees
    Fahrenheit.
    ¶28 SouthTowne also offered the expert testimony of Detlef
    Kuehn, a mechanical engineer who specialized in automotive
    engineering, and who worked at Volkswagen AG as a test
    engineer in the vehicle safety department. Before trial, Kuehn had
    done field testing to measure engine temperatures of a similar
    model Volkswagen under various driving conditions, including
    five minutes of ―full blast‖ driving. After the ―full blast‖ driving,
    he found that the hottest engine temperature was on the
    turbocharger, which reached 653 degrees Fahrenheit.
    ¶29 Following an eight-day trial, the jury returned a verdict
    in Smith‘s favor on both her negligence and strict liability claims.
    The jury awarded Smith a total of $2,700,000 in non-economic
    damages. SouthTowne subsequently filed three motions under the
    Utah Rules of Civil Procedure seeking to overturn the jury‘s
    verdict: (1) a rule 50 motion for judgment notwithstanding the
    verdict,7 (2) a rule 59 motion for a new trial, and (3) a motion for
    relief from judgment under rule 60(b).
    Rulings on SouthTowne’s Post-Trial Motions
    ¶30 After holding oral argument, the district court granted
    SouthTowne‘s motion for judgment as a matter of law because it
    concluded Smith had provided legally insufficient evidence on the
    element of causation. In its ruling, the district court rejected an
    __________________________________________________________
    7 Rule 50 was amended in 2016 to change the terms ―directed
    verdict‖ and ―judgment notwithstanding the verdict‖ to
    ―judgment as a matter of law.‖ Arnold v. Grigsby, 
    2018 UT 14
    , ¶ 10
    n.2, 
    417 P.3d 606
     (discussing UTAH. R. CIV. P. 50). This change had
    no substantive effect on the existing standard. 
    Id.
     We use the
    updated term ―judgment as a matter of law,‖ but we employ
    ―directed verdict‖ and ―judgment notwithstanding the verdict‖
    when quoting other sources that use those older terms.
    9
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    argument advanced by SouthTowne that Smith had failed to
    sufficiently establish the applicable standard of care.
    ¶31 The court also conditionally granted SouthTowne‘s
    motion for a new trial because it determined that two of Smith‘s
    experts, Leiss and Dr. Weaver, provided testimony that it should
    have excluded.8 Specifically, the court concluded that the
    laboratory test relied upon by Leiss was unreliable because it was
    performed by a lab technician that the court believed to be
    unknown, and Leiss was not an expert in chemistry and therefore
    could not assess the reliability of the test performed by the
    unidentified technician. The court ruled that it would be unfair for
    the verdict to stand where Leiss‘s testimony relied upon an
    ―obviously unreliable test,‖ and ―where [the test] was the only
    evidence supporting the creation of [carbon monoxide].‖
    ¶32 The court also concluded that it should not have
    admitted Dr. Weaver‘s opinion testimony that Smith was
    poisoned by carbon monoxide during her drive to Washington.
    The court believed Dr. Weaver had failed to consider in his
    differential diagnosis the fact that Smith had lived in her car for a
    period of time, which the court deemed to be another possible
    source of carbon monoxide poisoning.
    ¶33 In reaching its rulings regarding the testimony of Leiss
    and Dr. Weaver, the court rejected a number of arguments
    advanced by SouthTowne in support of its new trial motion.
    Relevant here, the court rejected SouthTowne‘s arguments that
    (1) Smith improperly relied on the deceased Dr. Orrison‘s MRI
    report and associated findings, and (2) Dr. Weaver‘s testimony
    suffered from reliability defects that rendered his differential
    diagnosis inadmissible.
    ¶34 With regard to SouthTowne‘s rule 60(b) motion, Smith
    argued that the court should deny it as untimely because
    __________________________________________________________
    8 After granting SouthTowne‘s motion for judgment as a
    matter of law, the district court conditionally ruled on
    SouthTowne‘s new trial motion in accordance with rule 50(c)(1) of
    the Utah Rules of Civil Procedure, which states
    If the court grants a renewed motion for judgment
    as a matter of law, it must also conditionally rule on
    any motion for a new trial by determining whether a
    new trial should be granted if the judgment is later
    vacated or reversed.
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    SouthTowne had filed the motion sixty-eight days after judgment
    was entered in the case—forty days later than required under rule
    59(b). The court rejected Smith‘s argument and excused the late
    filing. But it declined to rule on the 60(b) motion at that time,
    concluding that an evidentiary hearing was necessary to resolve
    the motion.
    ¶35 Smith appeals all three orders. And although it prevailed
    in the district court, SouthTowne files a cross appeal, re-asserting
    arguments that the district court rejected. Specifically,
    SouthTowne contends that (1) the court should have granted its
    motion for judgment as a matter of law on the ground that Smith
    did not provide expert testimony on the standard of care
    applicable to a car dealership facing a recall campaign, and that
    (2) the district court should have granted its motion for a new trial
    on the grounds that (a) reliability defects in Dr. Weaver‘s
    differential diagnosis rendered his causation opinions
    inadmissible, and (b) presentation of Dr. Orrison‘s findings and
    associated imaging should not have been disclosed to the jury
    during testimony or otherwise.9 For the same reasons,
    SouthTowne also requests that in the event of a new trial, we
    instruct the district court to exclude Dr. Weaver‘s opinions in their
    entirety and exclude evidence of Dr. Orrison‘s scans and report.
    ¶36 We exercise jurisdiction under Utah Code section
    78A-3-102(3)(j).
    STANDARDS OF REVIEW
    ¶37 This case comes to us on direct appeal from the district
    __________________________________________________________
    9 We also received amicus briefing from the Product Liability
    Advisory Council, Inc. (PLAC), a non-profit professional
    association of corporate members representing American and
    international products manufacturers, and the Utah Defense
    Lawyers Association (UDLA). PLAC requests clarification on
    admissibility standards related to expert testimony in product
    liability and toxic tort cases, including the admissibility of expert
    medical causation opinions and the dose-response evidentiary
    foundation needed to prove medical causation in toxic tort cases.
    UDLA requests clarification of the proper application of
    admissibility determinations under Utah Rule of Evidence 702,
    noting confusion over advisory language in the 2007 amendment.
    We address these concerns below. See infra ¶¶ 80 n.16; 113 n.19;
    131 n.22.
    11
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    court. Because of the variety of issues raised by the parties, we
    employ multiple standards of review in this case.
    ¶38 Smith appeals three of the district court‘s post-trial
    orders. First, she challenges the district court‘s order granting
    SouthTowne‘s motion for judgment as a matter of law. We review
    rulings on such motions for correctness, see ASC Utah, Inc. v. Wolf
    Mountain Resorts, L.C., 
    2013 UT 24
    , ¶ 18, 
    309 P.3d 201
    , and in
    doing so ―accept as true all testimony and reasonable inferences‖
    that support the jury‘s verdict. Gold Standard, Inc. v. Getty Oil Co.,
    
    915 P.2d 1060
    , 1066 (Utah 1996).
    ¶39 In its cross appeal of the district court‘s ruling on its
    motion for judgment as a matter of law, SouthTowne contends the
    district court erred in rejecting its argument that Smith‘s
    negligence claim should not have gone to the jury because she did
    not present expert testimony on the standard of care applicable to
    an auto dealer implementing a manufacturer‘s recall pursuant to
    federal regulations. Whether expert testimony is required to
    establish the applicable standard of care in a particular case
    presents a question of law, which we review for correctness. See
    Grynberg v. Questar Pipeline Co., 
    2003 UT 8
    , ¶ 20, 
    70 P.3d 1
    (explaining that questions of law are reviewed for correctness).
    ¶40 Smith next argues that the district court erred in
    conditionally granting SouthTowne a new trial based on the
    court‘s conclusion that it had erroneously admitted certain expert
    testimony. ―We apply an abuse of discretion standard in
    reviewing a [district court‘s] decision to grant or deny a new trial
    . . . .‖ USA Power, LLC v. PacifiCorp, 
    2016 UT 20
    , ¶ 30, 
    372 P.3d 629
    (citation omitted).10 In doing so, ―[w]e review the legal standards
    __________________________________________________________
    10 In the past, we established different standards of review
    depending on whether the trial court denied or granted a motion
    for a new trial based on alleged insufficiency of evidence under
    Utah Rule of Civil Procedure 59(a)(6). See Nelson v. Trujillo,
    
    657 P.2d 730
    , 731–32 (Utah 1982). In cases where the lower court
    denied a motion for a new trial, we affirmed the decision on
    appeal ―if there was an evidentiary basis for the jury‘s decision‖
    and reversed ―only if the evidence to support the verdict was
    completely lacking or was so slight and unconvincing as to make
    the verdict plainly unreasonable and unjust.‖ Id. at 732 (citations
    omitted) (internal quotation marks omitted). Where the district
    court granted a motion for a new trial, however, we sustained the
    (continued . . .)
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    applied by the [district] court . . . for correctness and the [district]
    court‘s factual findings for clear error.‖ State v. Bess, 
    2019 UT 70
    ,
    ¶ 17, 
    473 P.3d 157
     (alterations in original) (citation omitted)
    (internal quotation marks omitted).
    ¶41 On cross appeal, SouthTowne contends that the district
    court erroneously admitted other expert testimony. ―Two
    different standards of review apply to . . . claims regarding the
    admissibility of evidence.‖11 Northgate Vill. Dev., LC v. City of
    Orem, 
    2019 UT 59
    , ¶ 14, 
    450 P.3d 1117
     (citation omitted). ―The first
    standard of review, correctness, applies to the legal questions
    underlying the admissibility of evidence.‖ 
    Id.
     (citation omitted)
    (internal quotation marks omitted). ―The second standard of
    review, abuse of discretion, applies to the [district] court‘s
    decision to admit or exclude evidence . . . and to . . .
    determination[s] regarding the admissibility of expert
    testimony.‖ 
    Id.
     (first and second alterations in original) (citation
    omitted) (internal quotation marks omitted).
    ¶42 Finally, Smith challenges the timeliness of SouthTowne‘s
    rule 60(b) motion and argues the district court should have denied
    the motion on that basis. While ―[w]e grant broad discretion to a
    [district] court[‘s] rule 60(b) rulings,‖ and ―accordingly review a
    district court‘s denial [or grant] of a 60(b) motion under an abuse
    of discretion standard,‖ such ―discretion is not unlimited.‖
    Archuleta v. Galetka, 
    2011 UT 73
    , ¶ 152, 
    267 P.3d 232
     (third
    alteration in original) (citations omitted) (internal quotation marks
    omitted). ―A decision premised on flawed legal conclusions, for
    instance, constitutes an abuse of discretion.‖ Lund v. Brown,
    decision on appeal ―if the record contain[ed] substantial
    competent evidence which would support a verdict for the
    [moving party].‖ 
    Id.
     (second alteration in original) (citations
    omitted) (internal quotation marks omitted).
    Neither party invoked Nelson as a standard of review in this
    case, but we take the time here to note that, in the ensuing years,
    Nelson has been overtaken by our streamlining of our standards of
    review. Today, the standard of review for a district court‘s denial
    or grant of a motion for a new trial is abuse of discretion.
    11Our evidentiary-related standards of review also apply to
    SouthTowne‘s cross appeals regarding the testimony of Dr.
    Weaver and Smith‘s reliance at trial on the reports of the deceased
    Dr. Orrison.
    13
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    
    2000 UT 75
    , ¶ 9, 
    11 P.3d 277
    . And while ―[w]e review a district
    court‘s findings of fact under a clear error standard,‖ we review
    ―conclusions of law for correctness, affording the [district] court
    no deference.‖ Menzies v. Galetka, 
    2006 UT 81
    , ¶ 55, 
    150 P.3d 480
    .
    ANALYSIS
    ¶43 We first address Smith‘s challenge to the district court‘s
    order granting judgment as a matter of law to SouthTowne,
    notwithstanding the jury verdict in her favor. Then we address
    SouthTowne‘s related cross appeal.
    I. ORDER GRANTING JUDGMENT AS A MATTER OF LAW
    ¶44 The district court granted judgment as a matter of law to
    SouthTowne because the court concluded that the evidence
    adduced at trial was legally insufficient to prove causation. Smith
    argues that the court erred in making this determination because
    it failed to consider all the causation-related evidence presented to
    the jury. SouthTowne defends the court‘s determination and,
    alternatively, argues that the district court should have granted its
    motion on the ground that Smith failed to establish the standard
    of care applicable to her negligence claim.
    ¶45 After considering all the evidence presented to the jury,
    we conclude that Smith provided legally sufficient evidence of
    both causation and the applicable standard of care. Accordingly,
    we reverse the district court‘s grant of judgment as a matter of law
    to SouthTowne on the basis of causation, but we affirm the court‘s
    rejection of SouthTowne‘s standard of care argument as an
    alternative reason to grant judgment in its favor on Smith‘s
    negligence claim.
    ¶46 Rule 50 permits a court to grant judgment as a matter of
    law only where ―the court finds that a reasonable jury would not
    have a legally sufficient evidentiary basis to find for the party‖ on
    a claim or defense. UTAH R. CIV. P. 50(a)(1). In addressing a rule 50
    motion, ―a trial court must look at the evidence and all reasonable
    inferences in a light most favorable to the nonmoving party.‖
    Franklin v. Stevenson, 
    1999 UT 61
    , ¶ 6, 
    987 P.2d 22
    . And because
    this type of motion ―does not raise questions relating to the
    competency or admissibility of evidence,‖ courts must take the
    evidence ―as it existed at the close of the trial, and evidence
    admitted over objection cannot be excluded nor can evidence be
    included which was improperly rejected.‖ Id. ¶ 7 (citation
    omitted). In other words, ―[w]hether competent or incompetent,
    14
    Cite as: 
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    Opinion of the Court
    all evidence submitted to the jury must be considered by the court.‖ 
    Id.
    (citation omitted).
    A. Causation
    ¶47 We first address the district court‘s conclusion that Smith
    failed to present legally sufficient evidence to prove the element
    of causation. Smith had to prove causation as an element of both
    her negligence and strict liability claims.12
    ¶48 In ruling on SouthTowne‘s motion for judgment as a
    matter of law, the district court concluded that Smith had to prove
    four facts by a preponderance of the evidence in order to establish
    causation: that (1) carbon monoxide was actually produced under
    the hood of her car during the incident in question; (2) once the
    carbon monoxide was created, it had a pathway into the
    passenger compartment of Smith‘s car; (3) once it entered the
    passenger compartment, the carbon monoxide was sufficiently
    concentrated to cause Smith harm; and (4) the carbon monoxide
    actually caused Smith‘s injury.
    ¶49 The court found that Smith had provided sufficient
    evidence of the second and fourth facts it identified. But it
    __________________________________________________________
    12 To prove negligence, a plaintiff must show (1) a duty
    existed; (2) breach of that duty; (3) causation, which encompasses
    both cause-in-fact and proximate cause; and (4) damages. See
    Gerbich v. Numed Inc., 
    1999 UT 37
    , ¶ 14, 
    977 P.2d 1205
    ; Raab v. Utah
    Ry. Co., 
    2009 UT 61
    , ¶¶ 22–23, 
    221 P.3d 219
    . In negligence actions,
    we employ a ―substantial factor‖ test to determine causation, see,
    e.g., Devine v. Cook, 
    279 P.2d 1073
    , 1080 (Utah 1955) (applying the
    substantial factor test in a negligence case), which rests on the
    ―principle that causation exists when the defendant‘s conduct is
    an important or significant contributor to the plaintiff‘s injuries,‖
    Gardner v. Gardner, 
    2019 UT 61
    , ¶ 23, 
    452 P.3d 1134
     (quoting
    Substantial-cause Test, BLACK‘S LAW DICTIONARY, (11th ed. 2019)).
    In a strict product liability suit, a plaintiff must prove three
    elements: ―(1) that the product was unreasonably dangerous due
    to a defect or defective condition, (2) that the defect existed at the
    time the product was sold, and (3) that the defective condition
    was a cause of the plaintiff‘s injuries.‖ Blank v. Garff Enters. Inc.,
    
    2021 UT App 6
    , ¶ 26 n.6, 
    482 P.3d 258
     (citation omitted); see also
    UTAH CODE § 78B-6-703. Liability in these cases rests on the
    defective product itself, and not on any underlying negligence.
    Gudmundson v. Del Ozone, 
    2010 UT 33
    , ¶ 45, 
    232 P.3d 1059
    .
    15
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    concluded that no evidence was adduced at trial showing that it
    was more probable than not that carbon monoxide was actually
    produced under the hood of Smith‘s car during her drive to
    Washington, or that the carbon monoxide was present in her
    passenger compartment in a sufficient quantity to have caused her
    injuries.
    ¶50 With regard to the specific facts identified by the district
    court as critical to determining causation, it is important to
    remember that a plaintiff‘s burden of proof relates to the required
    elements of each claim, not to individual facts. See, e.g.,
    Orvis v. Johnson, 
    2008 UT 2
    , ¶ 10, 
    177 P.3d 600
     (―Where the moving
    party would bear the burden of proof at trial, the movant must
    establish each element of his claim in order to show that he is
    entitled to judgment as a matter of law.‖). To be sure, certain facts
    are ―material‖ in that they are ―significant or essential to the issue
    . . . at hand‖ and may ―make[] a difference in the result to be
    reached in a given case.‖ Fact, BLACK‘S LAW DICTIONARY (11th ed.
    2019). The role that material facts play in a motion for judgment as
    a matter of law is the same as in a motion for summary judgment:
    the moving party must show there were no genuine issues of
    material fact for the factfinder to weigh and that they are entitled
    to judgment as a matter of law. See Nay v. Gen. Motors Corp., GMC
    Truck Div., 
    850 P.2d 1260
    , 1264 (Utah 1993) (explaining that ―both
    summary judgment and directed verdicts require that no
    questions of material fact exist and that the moving party be
    entitled to judgment as a matter of law‖).
    ¶51 A ―finding of causation cannot be predicated on mere
    speculation or conjecture.‖ Lindsay v. Gibbons & Reed, 
    497 P.2d 28
    ,
    31 (Utah 1972). For this reason, a plaintiff fails to provide legally
    sufficient evidence of causation ―unless there is evidence from
    which the inference may reasonably be drawn that the injury
    suffered was caused by the negligent act of the defendant.‖ 
    Id.
     In
    other words, evidence of causation is insufficient if it leaves jurors
    to ―speculate as to possibilities.‖ 
    Id.
     Instead, the evidence must
    allow ―reasonable minds‖ to ―make justifiable inferences‖ based
    on all the evidence—including direct, circumstantial, and expert
    evidence—that a defendant‘s negligence (in a negligence claim) or
    the defective condition (in a strict liability claim) caused the harm.
    
    Id.
    ¶52 We first address the district court‘s conclusion that Smith
    failed to prove it was more likely than not that that the leaking
    diesel fuel produced carbon monoxide when it came in contact
    16
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    Opinion of the Court
    with hot spots in the Volkswagen‘s engine compartment. The
    court reasoned that this was ―a mixed issue of chemistry and
    automotive engineering.‖ And it concluded that Smith ―failed to
    call an expert (properly trained in the relevant discipline) to
    support that diesel fuel more likely than not was converted to
    [carbon monoxide] under the conditions that were present under
    the hood of her vehicle.‖ Rather, Leiss could testify only that it
    was possible for this to have happened.
    ¶53 As a threshold matter, we note that Smith did not have
    the burden to prove this particular fact by a preponderance of the
    evidence. See supra ¶ 50. But this fact was certainly material to
    proving causation.
    ¶54 And we agree with the district court that expert
    testimony was necessary on this point, because the question of
    whether diesel fuel leaking onto the Volkswagen‘s engine
    compartment could produce carbon monoxide required expertise
    beyond the knowledge of a layperson. And where jurors cannot,
    without unjustifiable speculation, resolve a dispute based on the
    facts of the case and their own experiences, expert testimony is
    required. See USA Power, LLC v. PacifiCorp, 
    2016 UT 20
    , ¶ 118,
    n.217, 
    372 P.3d 629
     (explaining that ―expert testimony is generally
    required to establish complex questions of causation‖); but see
    Sheppard v. Geneva Rock, 
    2021 UT 31
    , ¶ 31, 
    493 P.3d 632
     (noting,
    conversely, that expert testimony is ―not necessarily required‖ to
    prove causation ―when the causal connection is readily apparent
    using only ‗common knowledge‘‖ (citation omitted) (internal
    quotation marks omitted)).
    ¶55 However, the need for expert testimony in a case neither
    diminishes the importance of non-expert evidence nor minimizes
    the jury‘s role as the factfinder. Rather, expert testimony is meant
    to supplement the jury‘s knowledge so that the jury may decide
    the case without resorting to ―mere speculation or conjecture.‖
    Lindsay, 497 P.2d at 31.
    ¶56 Expert testimony that fails to take the case out of the
    realm of speculation or conjecture is insufficient on its own to
    sustain a plaintiff‘s burden of proof at trial. See, e.g., Fox v. Brigham
    Young Univ., 
    2007 UT App 406
    , ¶ 23, 
    176 P.3d 446
     (holding that
    expert testimony was needed ―to prevent the fact-finder from
    resorting to speculation‖ where the medical factors at issue in the
    case were ―sufficiently complicated to be beyond the ordinary
    senses and common experience of a layperson‖).
    17
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    ¶57 But such testimony may nevertheless provide a sufficient
    basis for a reasonable inference in combination with other
    evidence in the case. See, e.g., Okla. Nat. Gas Co. v. Kelly,
    
    153 P.2d 1010
    , 1013 (Okla. 1944) (holding that expert testimony
    that an accident could have caused curvature of the spine,
    combined with evidence that no curvature of the spine existed
    prior to—but manifested shortly after—the accident and evidence
    that ―reasonably tended to exclude every other possible cause,‖
    was sufficient); Ketcham v. Thomas, 
    283 S.W.2d 642
    , 649–50 (Mo.
    1955) (stating that collision was a ―possible‖ cause of the
    plaintiff‘s constant menstrual bleeding, combined with evidence
    ―that immediately after the accident her condition changed to
    constant bleeding which could not be controlled, and that this
    constant bleeding was not common and was not a symptom . . .
    before the collision,‖ was sufficient to survive summary judgment
    on whether ―the accident was the cause of the constant bleeding‖);
    Ideal Food Prods. Co. v. Rupe, 
    261 P.2d 992
    , 993–94 (Ariz. 1953)
    (explaining that evidence was sufficient to support damages
    award where the plaintiff put forward expert testimony that her
    injury, which was diagnosed after the fall at issue, was ―caused by
    a fall or some injury;‖ there was ―no evidence of a prior trauma or
    injury that could have been the cause;‖ and the plaintiff testified
    ―to extreme pain after the accident and that prior to this fall she
    had never experienced any pain in and about her left hip‖);
    Rodrigues v. Georgia–Pacific Corp., 
    661 S.E.2d 141
    , 143–44 (Ga. Ct.
    App. 2008) (holding that expert testimony ―unequivocally stated‖
    that chlorine substantially contributed to the plaintiff‘s
    pneumonia but noting that ―even if the physician‘s testimony here
    were expressed only in terms of the chlorine being a ‗possible‘
    cause of [the plaintiff‘s] injuries, other nonexpert evidence . . .
    supplemented that testimony . . . [and the plaintiff‘s] testi[mony]
    that although he was in apparent good health, he immediately
    became ill upon his exposure to the chlorine, which continuously
    worsened into the pneumonia he suffered when he presented at
    the emergency room‖ was sufficient to survive summary
    judgment).
    ¶58 Such is the case here. Smith identifies several sets of
    evidence that, taken together, permitted the jury to make a non-
    speculative finding that the leaking diesel fuel produced carbon
    monoxide in Smith‘s engine compartment: (1) the expert
    testimony of Leiss; (2) the combined testimony of Mejia, the
    mechanic who worked on Smith‘s vehicle, Chemical Engineer
    Schumacher, and Mechanical Engineer Kuehn, (3) Chemical
    18
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    Opinion of the Court
    Engineer Silcox‘s concession, when confronted with his deposition
    testimony at trial, that ―it‘s possible‖ for fuel leaking on an engine
    to produce carbon monoxide; and (4) Dr. Weaver‘s differential
    diagnosis that Smith suffered carbon monoxide poisoning on her
    trip to Washington. Smith also points to her own first-hand
    testimony about her drive to Washington and the symptoms she
    suffered during and after the drive, and the testimony of other
    fact witnesses who noticed a marked difference in Smith before
    and after her trip to Washington.
    ¶59 The district court found that the expert testimony of Leiss
    established only that it was possible that carbon monoxide could
    be created in Smith‘s engine compartment. Smith argues that
    some of Leiss‘s testimony was more conclusive than this, but we
    agree with the district court‘s view of the evidence as it relates to
    Leiss‘s testimony here. Based on a lab test, which monitored the
    production of carbon monoxide in an enclosed space, Leiss
    testified that carbon monoxide can be created when diesel fuel
    hits a surface heated to 344 degrees Fahrenheit. And he testified
    that parts of the engine—the turbocharger and the exhaust
    manifold—could reach between 500 and 700 degrees Fahrenheit,
    and that the turbocharger was in an area of the engine
    compartment that would not receive a lot of air flow. But because
    the laboratory test did not replicate the conditions of a vehicle
    traveling at highway speeds, the court concluded this evidence
    established only that it was ―possible‖ carbon monoxide was
    produced in Smith‘s engine compartment during her drive, but
    not that it was ―actually created.‖ And the court concluded this
    possibility was insufficient to sustain a finding of causation.
    ¶60 However, there was additional evidence before the jury
    that was relevant to whether carbon monoxide was produced in
    Smith‘s engine compartment. The jury also heard the recorded
    testimony of Mejia, who worked on Smith‘s car after the engine
    started smoking. Mejia explained that he found large quantities of
    diesel fuel on various parts of the engine, including near the
    engine‘s turbocharger and exhaust manifold—locations that Leiss
    testified could reach between 500 and 700 degrees Fahrenheit.
    ¶61 The jury also heard from three of SouthTowne‘s expert
    witnesses: Dr. Silcox, Schumacher, and Kuehn. Dr. Silcox testified
    that carbon monoxide can autogenerate at 469 degrees Fahrenheit
    in an enclosed space and at 869 degrees Fahrenheit on a flat
    surface. And on cross-examination, Dr. Silcox—albeit
    acknowledging his lack of expertise related to automotive
    19
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    engines—conceded that his deposition testimony had
    acknowledged the possibility that parts of the engine could reach
    these temperatures.
    ¶62 Schumacher testified that he agreed with Dr. Silcox‘s
    testimony regarding the temperatures at which diesel fuel can
    produce carbon monoxide. And he further testified that diesel fuel
    on a surface heated to a minimum of 600 degrees Fahrenheit can
    produce carbon monoxide in excess of 300 ppm. Schumacher also
    testified that the surface of the engine‘s turbocharger can reach
    470 to 480 degrees Fahrenheit.
    ¶63 Finally, Kuehn testified that after driving a similar model
    Volkswagen at ―full blast‖ for five minutes, the turbocharger in
    the car‘s engine reached 653 degrees Fahrenheit.
    ¶64 So from SouthTowne‘s three expert witnesses, the jury
    heard evidence that carbon monoxide can begin to be produced if
    diesel fuel contacts a surface heated to 469 degrees Fahrenheit in
    an enclosed space; that the engine‘s turbocharger could reach
    temperatures of 470 to 480 degrees Fahrenheit; that carbon
    monoxide can be produced at 300 ppm on a 600-plus-degree
    Fahrenheit surface; and that the turbocharger can reach up to 653
    degrees Fahrenheit after five minutes at ―full blast‖ speeds.
    ¶65 In addition to the aforementioned expert witnesses, the
    jury also heard from a number of fact witnesses who testified
    about the circumstances surrounding the alleged carbon
    monoxide poisoning. For example, Smith testified that she drove
    the vehicle for approximately five hours while smelling noxious
    fumes and that upon stopping the vehicle, she observed smoke
    pouring from the engine compartment. She also testified that
    during her drive to Washington she exhibited symptoms that,
    according to her medical expert, were consistent with carbon
    monoxide poisoning. Additionally, a number of other individuals
    testified to having observed stark differences in Smith‘s health
    and behavior before and after her trip to Washington.
    ¶66 The jury also heard the expert testimony of Dr. Weaver.
    Dr. Weaver testified based on objective medical tests, such as an
    MRI scan of Smith‘s brain, that Smith had in fact been poisoned
    by carbon monoxide. And, after eliminating other potential causes
    and considering all the facts presented to him (including the facts
    listed above), Dr. Weaver opined that Smith had been poisoned
    by carbon monoxide while driving her Volkswagen from Utah to
    Washington in December 2011.
    20
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    Opinion of the Court
    ¶67 As part of his testimony, Dr. Weaver explained that
    smoldering fuel provides a very inefficient form of oxidation,
    which produces much more carbon monoxide than burning fuel
    would. He also testified that carbon monoxide poisoning is much
    more dangerous at higher altitudes because of the lower amounts
    of oxygen in the air. And he testified, based on Smith‘s estimated
    exposure time of five hours, that her injuries could have been
    caused by a 100-ppm concentration of carbon monoxide, and even
    less if the duration of exposure had exceeded the estimated five
    hours.
    ¶68 When we consider this evidence in total, there was
    sufficient evidence before the jury to allow it to reasonably infer
    that the leaked and heated fuel in Smith‘s engine compartment
    produced carbon monoxide.13 In sum, there was evidence that
    diesel fuel can produce carbon monoxide when heated to 344 or
    469 degrees Fahrenheit (depending on the expert) in an enclosed
    space, and that when heated to either 600 or 869 degrees
    Fahrenheit (likewise depending on the expert) on a flat surface in
    an unenclosed space, the fuel will produce carbon monoxide in
    excess of 300 ppm. Mejia, the mechanic, stated that there was
    diesel fuel on the turbocharger and exhaust manifold. Leiss
    testified that these parts of the engine can reach temperatures
    between 500 and 700 degrees Fahrenheit and that the
    turbocharger is in an area that receives little airflow. And Kuehn
    stated that the turbocharger could reach 653 degrees Fahrenheit
    after five minutes of high-velocity driving. This evidence provides
    a reasonable basis to conclude that fuel landed on the
    turbocharger and exhaust manifold and that these parts of the
    engine were heated to a temperature above 600 degrees
    Fahrenheit (thus creating conditions that could produce carbon
    monoxide in excess of 300 ppm).
    ¶69 Further, this conclusion is supported by other testimony,
    including that Smith experienced symptoms that are consistent
    with carbon monoxide poisoning; she observed smoke emanating
    from her engine compartment once she stopped her car; a medical
    expert found objective evidence that Smith had suffered carbon
    __________________________________________________________
    13 We note that in its response brief, SouthTowne addresses
    Smith‘s arguments regarding Leiss‘s causation testimony but
    makes no attempt to address the other sets of evidence discussed
    by Smith.
    21
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    monoxide poisoning; people who knew Smith testified that her
    behavior dramatically changed after her trip to Washington; and,
    after eliminating other potential causes, the medical expert opined
    that the December 2011 incident was the cause of the carbon
    monoxide poisoning.
    ¶70 On this record, there was sufficient evidence before the
    jury to support a reasonable, non-speculative finding that carbon
    monoxide was produced in Smith‘s engine compartment.
    Accordingly, this issue could not be decided as a matter of law.
    This was a factual dispute properly left to the jury.14
    ¶71 We next address the district court‘s conclusion that Smith
    was required to establish that it was more likely than not that a
    dose of carbon monoxide sufficient to poison her was present in
    her passenger compartment and that she failed to do so. As
    discussed above, Smith was not required to prove this fact by a
    preponderance of the evidence. Rather, she had the burden of
    proving the element of causation by a preponderance of the
    evidence. We agree with the district court that whether Smith was
    exposed to a harmful level of carbon monoxide was material to
    proving causation. But as we will explain, she did not necessarily
    have to prove causation by presenting direct expert testimony
    quantifying the concentration of carbon monoxide in her car.
    ¶72 Smith concedes that she did not provide any expert
    evidence of the carbon monoxide levels inside her passenger
    compartment during her drive to Washington. But she argues that
    such evidence is unnecessary based on our decision in Alder v.
    Bayer Corp., AGFA Div., 
    2002 UT 115
    , 
    61 P.3d 1068
    . SouthTowne
    argues that Alder does not apply here.
    ¶73 In that case, we held that to prove causation in toxic tort
    cases, it is not always necessary for plaintiffs to present expert
    testimony of the concentration or dosage of the alleged toxin to
    which they were exposed. 
    Id.
     ¶¶ 79–83. We did not create a
    blanket rule that such evidence would never be necessary. But we
    held that where a plaintiff does not present evidence of a toxin‘s
    concentration during the time of alleged exposure, other relevant
    circumstantial evidence can be sufficient to take the fact of
    __________________________________________________________
    14 For these reasons, see infra ¶¶ 60–69, we disagree with
    PLAC‘s argument that ―Leiss‘s opinion . . . was an essential
    predicate in the chain of causation‖—without which the district
    court ―was right to find a failure of proof.‖
    22
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    Opinion of the Court
    causation out of the realm of speculation. 
    Id.
     ¶¶ 82–83. These
    principles apply here.
    ¶74 In Alder, medical technicians brought a negligence action
    against the manufacturer of an x-ray processing machine, alleging
    that fumes from the machine caused harm. 
    Id.
     ¶¶ 1–2, 19. To
    satisfy the causation element, the plaintiffs presented medical
    experts who testified, based on the factual circumstances that had
    been explained to them and on their diagnosis of the technicians,
    ―that there is a cause[-]and[-]effect connection, all things
    considered, between [plaintiffs‘] exposure in the workplace and
    [their] symptoms.‖ Id. ¶ 8 (citation omitted).
    ¶75 But because the technicians were ―unable to prove
    exposure to any chemicals, let alone levels known to cause known
    toxic effects,‖ the district court held that they were ―unable to
    prove causation‖ and granted summary judgment in the
    defendant‘s favor. Id. ¶ 67 (citation omitted). We reversed. Id.
    ¶ 83.
    ¶76 In reversing the district court‘s decision, we found
    persuasive a Fifth Circuit opinion stating that ―the law does not
    require plaintiffs to show the precise level of [toxin] to which they
    were exposed.‖ Id. ¶ 76 (referencing Curtis v. M&S Petrol., Inc.,
    
    174 F.3d 661
     (5th Cir. 1999)). Rather, we explained all that is
    required is ―evidence from which a reasonable person could
    conclude that a defendant‘s emission has probably caused a
    particular plaintiff the kind of harm of which he or she complains
    before there can be a recovery.‖ Id. ¶ 73 (quoting Wright v.
    Willamette Indus., Inc., 
    91 F.3d 1105
     (8th Cir. 1996)).
    ¶77 We also explained that
    [i]t is well established that causation ―may be
    proved by circumstantial evidence,‖ . . . and that
    ―[t]he causal relation between an injury and its later
    physical effects may be established by the direct
    opinion of a physician, by his deduction by the
    process of eliminating causes other than the
    traumatic agency, or by his opinion based upon a
    hypothetical question.‖ Id. ¶ 87 (second and third
    alterations in original) (quoting Zuchowicz v. United
    States, 
    140 F.3d 381
    , 389 (2d Cir. 1998)).
    ¶78 As an example of the type of circumstantial evidence that
    can supplement an expert‘s opinion, we cited a case where
    causation was established through expert opinion based ―on the
    23
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    temporal relationship between the [alleged breach] and the start
    of the disease and the differential etiology method of excluding
    other possible causes.‖ Alder, 
    2002 UT 115
    , ¶ 86 (quoting
    Zuchowicz, 140 F.3d at 385).
    ¶79 With these legal principles in mind, we concluded that
    the technicians had presented sufficient evidence that they were
    exposed to a harmful dose of chemicals to create a dispute of fact
    for the jury. Specifically, we noted that the x-ray machine used
    chemicals known to cause the technicians‘ symptoms and that the
    machine ―produced an exhaust stream at least potentially laced
    with chemicals.‖ Alder, 
    2002 UT 115
    , ¶ 70 (emphasis added). And
    we noted that the technicians‘ medical experts had testified, after
    eliminating other potential causes, that there was a reasonable
    medical probability that the technicians‘ exposure to the x-ray
    machine caused the symptoms. Id. ¶¶ 8, 71. Based on this
    evidence, we concluded that the plaintiff technicians had
    provided sufficient evidence to support their theory of causation,
    even though they had no direct evidence of the quantity of the
    chemicals to which they were exposed.15 See id. ¶ 87.
    __________________________________________________________
    15 In summarizing our decision in Alder, we offered a helpful
    insight to future courts dealing with complicated causation issues,
    which warrants repetition in full:
    Individuals routinely feel the effects of a wide array
    of common phenomena whose mechanisms remain
    unexplained by science, including, for example, the
    law of gravity, the nature of light, the source of
    personality, and the process of cell differentiation. If
    a bicyclist falls and breaks his arm, causation is
    assumed without argument because of the temporal
    relationship between the accident and the injury.
    The law does not object that no one measured the
    exact magnitude and angle of the forces applied to
    the bone. Courts do not exclude all testimony
    regarding the fall because the mechanism of gravity
    remains undiscovered. Legally, an observable
    sequence of condition → event → altered condition,
    has been found sufficient to establish causation even
    when the exact mechanism is unknown. Therefore,
    we hold that Technicians enjoy the same
    opportunity to prove that which they can, as do the
    victims of more prosaic injuries.
    (continued . . .)
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    Opinion of the Court
    ¶80 The district court in this case distinguished Alder on
    factual grounds. But the rationale of Alder applies here.16 That case
    holds that plaintiffs provide sufficient evidence of causation even
    where they do not have an expert who can quantify their level of
    toxic exposure, as long as the evidence that was presented
    provided a reliable basis from which the jury could reasonably
    infer that the alleged toxin was present and that it harmed the
    plaintiff. As we explained, because ―one who injures another
    takes him as he is,‖ a ―toxic level‖ of a chemical ―becomes any
    level that is harmful to the[] specific plaintiff[].‖ Id. ¶ 81 (citation
    omitted).
    ¶81 Based on the principles articulated in Alder and our other
    causation cases, we conclude the evidence at trial here was
    sufficient to permit the jury to find without speculation that Smith
    was exposed to a harmful dose of carbon monoxide during her
    drive. We first note that Smith did present some evidence of the
    level at which carbon monoxide generally becomes harmful, and
    some evidence of the concentration of carbon monoxide produced
    under her hood. According to Dr. Weaver, exposure to a 100-ppm
    concentration of carbon monoxide over a five–hour period could
    have caused Smith‘s carbon monoxide poisoning. And, as we
    explained above, the evidence supported a reasonable inference
    that the smoldering fuel could produce carbon monoxide at a
    concentration of about 300 ppm. As the district court recognized,
    Leiss testified that there was a pathway for this carbon monoxide
    to enter the passenger compartment of the vehicle. While this
    evidence could not account for certain variables and therefore
    could not quantify the concentration of carbon monoxide to which
    Smith was actually exposed in the passenger compartment of the
    vehicle, it did constitute some evidence of the possible amount of
    Smith‘s exposure.
    Alder v. Bayer Corp., AGFA Div., 
    2002 UT 115
    , ¶ 88, 
    61 P.3d 1068
    .
    16 PLAC likewise argues that Alder is ―the exception, not the
    rule,‖ and that the exception carved out in that case should not
    apply here. But the overarching principles we articulated in Alder
    remain applicable to these facts. And it is the totality of evidence
    presented in this case—admittedly lacking precise quantification
    of the dose of carbon monoxide to which Smith was exposed—
    that supports a non-speculative finding of causation.
    25
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    ¶82 Further, the harmful chemical at issue in this case—
    carbon monoxide—is ―known to cause‖ the symptoms Smith
    suffered. And there is ample circumstantial evidence that Smith
    suffered carbon monoxide poisoning during the drive. Smith
    testified that she experienced symptoms consistent with carbon
    monoxide poisoning during and after the drive; she and other fact
    witnesses testified to a significant change in her behavior
    immediately after the drive; and Dr. Weaver concluded, based on
    brain scans (among other things), that Smith had indeed
    experienced carbon monoxide poisoning.
    ¶83 Finally, as in Alder, in this case a medical expert testified
    that, after eliminating other potential causes, there was a
    reasonable medical probability that Smith‘s carbon monoxide
    poisoning was caused by the incident in question. Alder,
    
    2002 UT 115
    , ¶ 8.
    ¶84 This evidence was sufficient to provide the jury with a
    reasonable basis to find that Smith was exposed to a harmful dose
    of carbon monoxide during her drive. See id. ¶ 80 (―[W]herever
    chemicals are part of the environment, victims‘ toxic symptoms
    are themselves evidence of harmful levels, at least as an issue of
    triable fact.‖); see also id. ¶ 87 (―[I]t is well established that
    causation ‗may be proved by circumstantial evidence,‘ . . . and
    that ‗[t]he causal relation between an injury and its later physical
    effects may be established by the direct opinion of a physician, by
    his deduction by the process of eliminating causes other than the
    traumatic agency, or by his opinion based upon a hypothetical
    question.‖ (alterations in original) (quoting Zuchowicz, 140 F.3d at
    389). Indeed, this evidence was sufficient to permit the jury to find
    that the carbon monoxide produced by the leaking diesel fuel
    reached Smith and caused her to suffer carbon monoxide
    poisoning. And while SouthTowne argues that Leiss‘s evidence
    alone was not sufficient to establish this point, it does not address
    at all the remainder of the relevant evidence presented to the jury.
    ¶85 Under Alder, Smith was not required to prove the level of
    carbon monoxide to which she was exposed. To prove her theory
    of causation, Smith needed to adduce evidence that would permit
    the jury to find, without speculation or guesswork, that she was
    exposed to enough carbon monoxide to harm her. We conclude
    that she did so.
    ¶86 Accordingly, we conclude that Smith presented legally
    sufficient evidence of causation. And we reverse the grant of
    judgment as a matter of law to SouthTowne.
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    B. Standard of Care
    ¶87 On cross appeal, SouthTowne argues that an alternative
    basis for granting judgment in its favor is that Smith was required
    to present an expert who could opine on the standard of care
    applicable to a car dealership handling a vehicle recall, and she
    failed to do so. The district court rejected this argument,
    concluding that expert testimony on this issue was unnecessary
    and that, regardless, this argument was superfluous because
    ―even if the [c]ourt directed a verdict as to negligence, [Smith‘s
    strict liability] claim would still stand.‖
    ¶88 We agree with the district court. The evidence before the
    jury, which included testimony from a Volkswagen service
    manager and a Volkswagen senior manager of product analysis,
    was sufficient to provide the jury with a reasonable basis to find
    that SouthTowne acted unreasonably in selling the recalled
    vehicle to Smith. And even if SouthTowne had prevailed on this
    argument it would still be liable for Smith‘s injuries based on
    strict liability.
    ¶89 ―To determine the relevant standard of care in negligence
    cases, the essential question is the care that a reasonable person
    would undertake in the defendant‘s circumstances.‖ Gables at
    Sterling Vill. Homeowners Ass’n, Inc. v. Castlewood-Sterling Vill. I,
    LLC, 
    2018 UT 04
    , ¶ 57, 
    417 P.3d 95
     (citation omitted) (internal
    quotation marks omitted). This is generally a question of fact for
    the jury. See 
    id.
     (―[B]ecause the essential question is the care that a
    reasonable person would undertake in the defendant‘s
    circumstances, we generally leave it to jurors—as ordinary
    persons representing a particular community—to make that
    judgment.‖ (citation omitted)). Therefore, in ordinary negligence
    cases, ―we ask a jury of reasonable people to draw upon their
    collective expertise to conclude how a reasonable person would
    have acted in [a given] circumstance.‖ 
    Id.
    ¶90 But SouthTowne argues that the complicated procedures
    involved with a vehicle recall prevented the jury from reliably
    answering the standard-of-care question here without the aid of
    expert testimony. We have recognized that, in limited cases,
    expert testimony may be needed to establish a standard of care.
    See id. ¶ 58 (―Our case law recognizes a limited exception to this
    general rule.‖). But those types of cases tend to implicate scientific
    or technical matters ―not within the common knowledge of the lay
    juror,‖ id. ¶ 58 (citation omitted) (internal quotation marks
    omitted), or require the plaintiff to establish ―a particularized and
    27
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    enhanced duty of care,‖ id. ¶ 56 (citation omitted). In other words,
    expert testimony is required only in cases where the average
    layperson lacks the technical or scientific knowledge to determine
    what a reasonable person would have done in the defendant‘s
    situation. See id. ¶ 59 (―[T]he need for expert testimony turns on
    the nature of the standard to be addressed by the jury. . . . Where
    the standard implicates scientific matters beyond the capacity of
    an ordinary juror . . . expert testimony may be required.‖ (citation
    omitted)).
    ¶91 In this case, there was sufficient evidence for the jury to
    determine how a reasonable person would have acted in response
    to the vehicle recall. The jury heard the testimony that
    Volkswagen Corporate issued a recall through a mandatory stop-
    sale order for a number of listed vehicles. This order prohibited
    the dealership from selling, leasing, or trading any of the covered
    vehicles—identified by the vehicle‘s vehicle identification number
    (VIN)—until a certain fuel line was replaced. And a Volkswagen
    service manager testified that a dealership could use the VIN to
    identify the vehicles on its lot that were subject to the recall.
    Additionally, a Volkswagen senior officer testified that Smith
    should not have been sold the vehicle at issue in this case. This is
    enough evidence for the jury to decide the standard-of-care
    question in Smith‘s favor.
    ¶92 In addressing SouthTowne‘s argument below, the district
    court concluded that ―there was nothing to indicate that a recall
    standard of care expert was required‖ in this case. We agree.
    SouthTowne has failed to show that the jury needed the help of
    expert testimony to determine what a reasonable person should
    have done in response to a mandatory stop-sale order.
    ¶93 In essence, SouthTowne‘s argument on this point is that it
    did not breach a standard of care when it sold the vehicle because,
    under SouthTowne‘s interpretation of applicable federal statutes,
    regulations, and industry safety standards, Volkswagen‘s stop-
    sale order did not apply to Smith‘s vehicle. But whether
    Volkswagen complied with applicable statutes or regulations is
    not an ultimate issue in this negligence case.
    ¶94 It is true, of course, that in some negligence cases a court
    may adopt a statute or regulation as a standard of care in addition
    to the typical reasonable-person standard. See, e.g., Colosimo v.
    Gateway Cmty. Church, 
    2018 UT 26
    , ¶ 44, 
    424 P.3d 866
     (discussing
    the circumstances in which it is appropriate to adopt a statute as a
    standard of care in a negligence case). But the existence of a
    28
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    Opinion of the Court
    relevant statute does not mean that a plaintiff is barred from
    proving negligence using the default reasonable-person standard.
    See generally 
    id.
     (discussing plaintiff‘s negligence claim under the
    typical reasonable-person standard of care as well as under an
    alleged statutory standard of care).
    ¶95 So, notwithstanding the various laws that may have also
    governed SouthTowne‘s conduct in this case, the only
    standard-of-care evidence Smith needed to present was evidence
    that a reasonable person would not have sold the vehicle to Smith
    after receiving the mandatory stop-sale order. Smith presented
    this evidence. And although SouthTowne presented contrary
    evidence, Smith‘s evidence provided the jury with a reasonable
    basis to rule in Smith‘s favor on this point.
    ¶96 Accordingly, we conclude that the district court correctly
    rejected SouthTowne‘s argument regarding the standard of care.
    And this does not provide an alternative basis for affirming the
    order of judgment as a matter of law in its favor.
    II. CONDITIONAL NEW TRIAL ORDER
    ¶97 Next, the district court conditionally granted
    SouthTowne a new trial because it concluded that certain
    testimony from two of Smith‘s experts—Leiss and Dr. Weaver—
    should have been excluded, and that without this testimony there
    was insufficient evidence to support Smith‘s claims. 17 Smith
    argues this was error because SouthTowne never made the
    objections that formed the basis of the court‘s ruling (therefore
    waiving them), the district court was wrong on the merits, and
    she was not given an opportunity to respond to the court‘s
    reasons for retroactively excluding the testimony. We find Smith‘s
    final argument to be persuasive. And because we reverse the
    __________________________________________________________
    17 The trial court analyzed SouthTowne‘s motion for a new
    trial under rule 59(a)(6) of the Utah Rules of Civil Procedure,
    which permits a new trial to be granted for ―insufficiency of the
    evidence to justify the verdict or other decision.‖ (The court
    identified the applicable rule as 59(a)(5), possibly due to a
    typographical error.) However, in its motion, SouthTowne argued
    it was deprived of a fair trial under rule 59(a)(1), which allows a
    court to grant a new trial based on ―irregularity in the
    proceedings of the court, jury or opposing party, or any order of
    the court, or abuse of discretion by which a party was prevented
    from having a fair trial.‖ UTAH R. CIV. P. 59(a)(1).
    29
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    court‘s rulings excluding testimony from Leiss and Dr. Weaver on
    this basis, we must reverse the court‘s grant of a conditional new
    trial.
    ¶98 On cross appeal, SouthTowne argues that the district
    court should have granted its new trial motion on two other
    grounds, which the court rejected: (1) that Dr. Weaver should not
    have been permitted to opine on causation due to alleged
    reliability defects in his differential diagnosis, and (2) that Dr.
    Orrison‘s brain scans and opinions should not have been
    disclosed to the jury because he was a non-testifying witness and
    Smith did not make the necessary foundational showing of
    authenticity or reliability. SouthTowne also argues that in the
    event of a new trial, we should correct these erroneous rulings.
    But we conclude the court correctly rejected the arguments
    SouthTowne advances in its cross appeal. So they do not provide
    an alternative basis for affirming the grant of a conditional new
    trial.
    ¶99 Rule 50 requires a court that has granted a motion for
    judgment as a matter of law to ―also conditionally rule on any
    motion for a new trial by determining whether a new trial should
    be granted if the judgment is later vacated or reversed.‖ UTAH R.
    CIV. P. 50(c)(1). In doing so, ―[t]he court must state the grounds for
    conditionally granting or denying the motion for a new trial‖
    under rule 59. 
    Id.
     A court may grant a new trial if it determines
    ―evidence has been erroneously admitted during the course of a
    trial.‖ Franklin v. Stevenson, 
    1999 UT 61
    , ¶ 10, 
    987 P.2d 22
    . But
    ―[n]o error in either the admission or the exclusion of evidence . . .
    is ground for granting a new trial . . . unless refusal to take such
    action appears to the court inconsistent with substantial justice.‖
    UTAH R. CIV. P. 61.
    ¶100 ―Granting a new trial is an extreme remedy.‖ Boyle v.
    Christensen, 
    2011 UT 20
    , ¶ 17, 
    251 P.3d 810
    . And while we will not
    disturb a ruling on a motion for a new trial absent an abuse of
    discretion, we have made clear that ―[t]he power of a trial judge to
    order a new trial is to be used in those rare cases when a jury
    verdict is manifestly against the weight of the evidence.‖
    Braithwaite v. W. Valley City Corp., 
    921 P.2d 997
    , 1001 (Utah 1996)
    (citation omitted). An abuse of discretion exists where ―the district
    court relied on an erroneous conclusion of law,‖ Northgate Vill.
    Dev., LC v. City of Orem, 
    2019 UT 59
    , ¶ 27, 
    450 P.3d 1117
     (citation
    omitted), or ―where there is no evidentiary basis for the trial
    30
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    Opinion of the Court
    court‘s ruling.‖ Dahl v. Dahl, 
    2015 UT 79
    , ¶ 63, 
    459 P.3d 276
    (citation omitted).
    ¶101 In its new trial ruling, the district court noted that the
    ―area of most concern‖ to the court was ―the testimony of Mr.
    Leiss.‖ We therefore begin with Leiss‘s expert testimony.
    A. Leiss
    ¶102 As discussed, at trial Smith offered the opinion
    testimony of Peter Leiss—an accident reconstruction expert and
    mechanical engineer with twenty years of experience in the
    automotive engineering industry, including in quality control for
    diesel fuel systems. Leiss was called to testify as to whether the
    diesel fuel spill could have generated carbon monoxide, and if so,
    whether there was a passageway for the carbon monoxide to
    travel from the engine compartment into the passenger
    compartment of Smith‘s car. The district court held that the latter
    issue was ―well within [Leiss‘s] bailiwick as an automotive
    engineer,‖ rendering its resolution a ―factual determination for
    the jury.‖ But the court found fault with Leiss‘s reliance on the test
    conducted by the lab technician at Robson Forensics, see supra
    ¶ 18, which the court referred to as the ―fish tank test.‖
    ¶103 The district court concluded that it had erred in
    admitting Leiss‘s testimony ―as it relates to the alleged production
    of [carbon monoxide] based on the fish tank test . . . because it was
    unreliable and prejudicial‖ to SouthTowne. In reaching its ruling,
    the court took particular umbrage at Leiss‘s reliance on an
    ―unidentified ‗lab technician‘ . . . working at [Leiss‘s] place of
    employment‖ who performed the test. The court also deemed the
    test inadmissible because Leiss was not a chemist and therefore
    was not qualified to assess the reliability of the test himself. The
    court also noted that during his trial testimony, Leiss was unable
    to answer a number of questions about the testing methods used.
    ¶104 The court essentially determined that Leiss‘s reliance on
    the test did not meet the standards of Utah Rule of Evidence 703,
    which permits experts to ―base an opinion on facts or data in the
    case that the expert has been made aware of or personally
    observed.‖ Under this rule, an expert‘s opinion may be based on
    otherwise inadmissible ―facts or data‖ that the expert has been
    made aware of, provided that ―experts in the particular field
    would reasonably rely on those kinds of facts or data in forming
    an opinion on the subject.‖ UTAH R. EVID. 703. If the proponent of
    the opinion intends to disclose the underlying ―facts or data‖ to
    the jury, and the facts or data are otherwise inadmissible (for
    31
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    example, because they are hearsay), the proponent may do so
    ―only if their probative value in helping the jury evaluate the
    opinion substantially outweighs their prejudicial effect.‖ Id.
    ¶105 The district court then concluded that because Leiss‘s
    opinion was based on an unreliable test for which he had
    provided insufficient foundation, his opinion that carbon
    monoxide could have been produced under Smith‘s hood was
    inadmissible under Utah Rule of Evidence 702(b). This rule
    mandates that any ―[s]cientific, technical, or other specialized
    knowledge‖ serving as the basis for expert testimony must meet
    ―a threshold showing that the principles or methods . . .
    underlying . . . the testimony (1) are reliable, (2) are based upon
    sufficient facts or data, and (3) have been reliably applied to the
    facts.‖ UTAH R. EVID. 702(b).
    ¶106 Smith first argues that SouthTowne waived this
    argument because it did not object to the test for the reasons relied
    upon by the district court either before or during trial or in its
    post-trial motions, and that, therefore, the district court‘s order
    should be reversed on this basis.
    ¶107 SouthTowne does not respond to Smith‘s waiver
    argument in its appellee brief. And it does not dispute Smith‘s
    assertion that it did not raise the particular objections relied upon
    by the district court.
    ¶108 Our independent review of the record confirms that
    SouthTowne did not raise these specific objections to Leiss‘s
    testimony. To be clear, in its pre-trial motion in limine,
    SouthTowne did object to Leiss testifying that the leaking diesel
    fuel created carbon monoxide in Smith‘s car. But it objected for a
    different reason. SouthTowne argued not that the laboratory test
    was unreliable, that the qualifications or identity of the lab
    technician were unknown, or that, as a non-chemist, Leiss was
    unqualified to judge whether the test was reliable or whether the
    technician was qualified. Rather, SouthTowne argued that Leiss
    should not be allowed to opine about carbon monoxide
    production in Smith‘s engine compartment because the test did
    not replicate the conditions inside the engine compartment of a
    moving vehicle. In this regard, SouthTowne and its experts took
    particular issue with the fact that the aquarium test was done in
    an enclosure and therefore did not account for air flow. In its
    reply brief in support of its motion in limine in the district court,
    SouthTowne explained:
    32
    Cite as: 
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    Opinion of the Court
    The reliability issue with respect to Mr. Leiss
    concerns the manner in which he proposes to apply
    his aquarium test to the facts of this case . . . . There
    are problems with this detection method . . . .
    Defendants concede, however, that this particular
    problem with the test goes to weight and will
    counter it with [expert] testimony . . . . The Rule 702
    problem arises from the way in which Mr. Leiss
    proposes to extrapolate from his aquarium results to
    conditions under the hood, and inside the passenger
    compartment, of the Smith vehicle.
    ¶109 So, in its motion in limine, SouthTowne did not challenge
    the admissibility of the test itself, the qualifications of the lab
    technician, or Leiss‘s reliance on the test. In fact, in criticizing one
    of the methods the lab technician used, SouthTowne recognized
    this went only to the weight to be given the evidence rather than
    the admissibility of the test itself.
    ¶110 SouthTowne also did not object to the admission of the
    test results during trial. During Leiss‘s direct examination, Smith
    offered the laboratory test results as an exhibit. The court asked
    SouthTowne if it had any objection to the exhibit, to which
    SouthTowne answered, ―No.‖18
    ¶111 So Smith is correct that SouthTowne did not challenge
    Leiss‘s testimony for the reasons relied upon by the district court
    either before or during trial. And SouthTowne also did not make
    an argument on this basis in its motion for a new trial.
    ¶112 Usually, this would be dispositive. See UTAH R. EVID.
    103(a)(1) (requiring a party to ―timely object[] or move[] to strike‖
    evidence it claims was erroneously admitted, and to ―state[] the
    specific ground‖ upon which the objection was lodged). But here,
    it is not the end of the analysis. Under civil rule 59(d), a court may
    grant a motion for a new trial ―for a reason not stated‖ in a party‘s
    motion ―[a]fter giving the parties notice and an opportunity to be
    heard.‖ UTAH R. CIV. P. 59(d).
    ¶113 In scrutinizing Leiss‘s testimony as it did, the district
    court was properly observing its role as gatekeeper with respect
    __________________________________________________________
    18 This may have been because SouthTowne‘s experts relied on
    similar tests, with variations to account for air flow. See supra
    ¶¶ 25–27.
    33
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    to the admissibility of expert testimony.19 The court raised
    concerns with Leiss‘s reliance on the aquarium test based on its
    front-row seat at the trial. And rule 59(d) permitted the court to
    grant a new trial for a reason not raised by SouthTowne in its new
    trial motion. So SouthTowne‘s failure to preserve this issue is not
    dispositive. However, as we will discuss, when a court proceeds
    under rule 59(d), it must give the non-moving party notice of its
    concerns and an opportunity to be heard.
    __________________________________________________________
    19 In its amicus brief, UDLA requests clarification of the proper
    application of admissibility determinations under rule 702, noting
    confusion over advisory language in the 2007 amendment.
    Specifically, UDLA argues that our advisory language
    ―incorrectly downplays the district court‘s important gatekeeping
    function,‖ thereby encouraging trial judges to include expert
    testimony ―so long as it can be said that any basic indication of
    reliability exists, no matter how far-fetched.‖ UDLA asks us to
    ―reject any reading of the advisory language that would
    discourage judges from asserting [their gatekeeping] role.‖
    UDLA accurately notes that our advisory language departs
    from the federal rule by broadening the scope of ―[s]cientific,
    technical, or other specialized knowledge‖ on which an expert
    may rely. See UTAH R. EVID. 702 & original advisory committee
    notes. But this does not suggest that trial judges should abdicate
    their gatekeeping role. Instead, rule 702 permits judges, as
    gatekeepers, to err on the side of admission within the confines of
    rule 702. ―[T]he rigor of [the rule‘s application] ‗will vary
    depending on the complexity of the particular case.‘‖ State v.
    Roberts, 
    2015 UT 24
    , ¶ 54, 
    345 P.3d 1226
     (quoting Eskelson ex rel.
    Eskelson v. Davis Hosp. & Med. Ctr., 
    2010 UT 59
    , ¶ 15, 
    242 P.3d 762
    ).
    Judges are compelled to exclude expert testimony where it is
    unhelpful, unreliable, unduly prejudicial, or has improperly
    invaded the province of the jury. See State v. Martin, 
    2017 UT 63
    ,
    ¶¶ 30–31, 
    423 P.3d 1254
    . But judges may not ―displace the
    province of the factfinder to weigh . . . evidence.‖ State v. Jones,
    
    2015 UT 19
    , ¶ 26, 
    345 P.3d 1195
    . And although ―the line between
    assessing reliability and weighing evidence can be elusive‖ under
    rule 702, ―the factfinder [and not arbiter] bears the ultimate
    responsibility for evaluating the accuracy, reliability, and weight
    of the testimony.‖ 
    Id.
     (quoting Gunn Hill Dairy Props., LLC v. L.A.
    Dep’t of Water & Power, 
    2012 UT App 20
    , ¶ 47, 
    269 P.3d 980
    ).
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    Opinion of the Court
    ¶114 Smith next argues that the district court was wrong on
    the merits. She contends that Leiss did know who performed the
    lab test and it was reasonable for Leiss to rely on the results of the
    test. First, Smith proffers Leiss‘s deposition testimony, in which he
    identifies the technician conducting the lab test as the ―test lab
    manager, Brett Johnson,‖ and she highlights a portion of Leiss‘s
    trial testimony in which he states that the technician does this
    kind of testing ―very often,‖ he is ―knowledgeable‖ and ―well
    versed‖ in this kind of testing, and experts at Robson Forensics
    typically rely on the technician. And she argues that she never
    had the opportunity to offer this response to the district court‘s
    concerns.
    ¶115 We ultimately do not resolve whether the district court‘s
    conclusion that it should have excluded this portion of Leiss‘s
    testimony was correct. This is because we find Smith‘s related
    argument—that she was not given the opportunity to respond to
    the court‘s concerns—to be dispositive.
    ¶116 While rule 59(d) permits a district court to grant a
    motion for a new trial for a reason not advanced by the moving
    party, a court may do this only ―[a]fter giving the parties notice
    and an opportunity to be heard.‖20 UTAH R. CIV. P. 59(d). See also
    Salt Lake Legal Def. Ass’n v. Atherton, 
    2011 UT 58
    , ¶ 12, 
    267 P.3d 227
    (explaining that due process mandates a party ―be given notice
    and an opportunity to be heard‖ before a judge ―adjudicate[s] its
    interests‖). This means that the non-moving party must be given
    ―timely and adequate notice‖ and an ―opportunity to be heard in
    a meaningful way.‖ Nelson v. Jacobsen, 
    669 P.2d 1207
    , 1211 (Utah
    1983). We have described this as ―the very heart of procedural
    fairness.‖ 
    Id.
    ¶117 Here, Smith was not on notice of the substance of the
    court‘s concerns prior to the hearing on SouthTowne‘s post-trial
    motions because SouthTowne had not raised these issues in its
    new trial motion. We recognize that an issue may become
    apparent to a court during argument on a post-trial motion, and
    thus make prior notice impossible. In such a situation, a court can
    __________________________________________________________
    20 We do not explicate upon the issues a court may properly
    raise sua sponte when granting a motion for a new trial, except to
    emphasize that it may do so only after giving the parties fair
    notice and a meaningful opportunity to be heard.
    35
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    ensure procedural fairness by giving the non-moving party
    additional time to address the new issue raised by the court.
    ¶118 In addition to lack of notice, Smith did not have a
    meaningful opportunity to be heard on the court‘s objections to
    the lab test. After the hearing, Smith attempted to submit an
    affidavit from Leiss to respond to the district court‘s concerns, but
    the court rejected the affidavit as an inappropriate attempt to add
    substantive evidence to the trial record. However, deposition
    testimony, affidavits, or other pertinent evidence may be admitted
    as information relevant to the court‘s legal determination
    regarding the admissibility of evidence. See UTAH R. EVID. 104(a)
    (―The court must decide any preliminary question about whether
    a witness is qualified . . . or evidence is admissible. In so deciding,
    the court is not bound by evidence rules, except those on
    privilege.‖); see also State v. Sheehan, 
    2012 UT App 62
    , ¶ 28,
    
    273 P.3d 417
     (―[T]here are two separate reliability determinations:
    admissibility, which is a legal determination the court makes, and
    the weight assigned to the evidence admitted at trial, which is a
    factual determination made by the fact finder.‖); Goebel v. Denver
    & Rio Grande W. R.R. Co., 
    215 F.3d 1083
    , 1087 (10th Cir. 2000) (―It
    is within the discretion of the trial court to determine how to
    perform its gatekeeping function under Daubert. The most
    common method for fulfilling this function is a Daubert hearing,
    although such a process is not specifically mandated. The district
    court may also satisfy its gatekeeper role when asked to rule on a
    motion in limine, on an objection during trial, or on a post-trial
    motion so long as the court has sufficient evidence to perform ‗the
    task of ensuring that an expert‘s testimony both rests on a reliable
    foundation and is relevant to the task at hand.‘‖ (second emphasis
    added) (citations omitted)).
    ¶119 Where a court is considering granting a new trial based
    on concerns outside those raised by the moving party, rule 59(d)
    requires the court to ensure that the non-moving party has
    adequate notice of the new issues and a meaningful opportunity
    to address them before granting the motion. Because this did not
    happen here, we reverse the court‘s new trial ruling excluding the
    portion of Leiss‘s testimony that relied on the aquarium test.21
    __________________________________________________________
    21 However, we note that even if this portion of Leiss‘s
    testimony were excluded, it would not necessarily render the
    evidence at trial insufficient to justify the verdict under rule
    (continued . . .)
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    B. Dr. Weaver
    ¶120 Smith next challenges the district court‘s grant of
    SouthTowne‘s new trial motion based on the court‘s conclusion
    that it should not have admitted Dr. Weaver‘s testimony. We
    reverse this ruling as well, because it is based on an issue
    SouthTowne did not raise in its new trial motion, and Smith did
    not have notice of or a meaningful opportunity to respond to the
    court‘s concerns with Dr. Weaver‘s testimony.
    ¶121 Dr. Weaver opined that Smith had suffered carbon
    monoxide exposure while driving her Volkswagen to Washington
    in December 2011. He based this opinion on a review of Smith‘s
    medical files, on his experience diagnosing carbon monoxide
    poisoning, on an in-person evaluation of Smith—which included
    physical and neurological examinations, an interview about
    Smith‘s medical history, and on a battery of written
    questionnaires and assessments, and on his elimination of other
    potential causes. The process of identifying the cause of an injury
    by eliminating other potential causes—a process referred to as a
    ―differential diagnosis‖—is generally considered a reliable
    method supporting expert testimony. See Alder v. Bayer Corp.,
    AGFA Div., 
    2002 UT 115
    , ¶ 63, 
    61 P.3d 1068
    .
    ¶122 But although this method is generally accepted, the
    district court found Dr. Weaver‘s diagnosis problematic because
    the court believed Dr. Weaver was unaware of ―a second possible
    source of [carbon monoxide] poisoning‖—a period of time in
    which Smith became homeless and lived in her car. For this
    reason, the court ruled that SouthTowne‘s motion for a new trial
    should be granted because ―Dr. Weaver‘s testimony regarding the
    source of Plaintiff‘s [carbon monoxide] poisoning was not properly
    supported by substantial competent evidence.‖
    ¶123 Smith argues that SouthTowne waived this objection.
    She is correct. SouthTowne‘s argument at trial and in its motion
    for a new trial was that Dr. Weaver‘s differential diagnosis was
    unreliable because Smith had an upper respiratory infection when
    she drove to Washington, and Dr. Weaver failed to reliably rule
    59(a)(6). As discussed above, see supra ¶¶ 58–70, the lab test
    results and Leiss‘s corresponding testimony were not the only
    evidence from which the jury could have reasonably inferred that
    the diesel fuel leaking onto Smith‘s engine compartment
    produced carbon monoxide.
    37
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    out the respiratory infection as the cause of Smith‘s symptoms.
    And that is a substantively different argument than the court‘s
    concern that Dr. Weaver had not ruled out the period when Smith
    lived in her car.
    ¶124 But again, waiver is not dispositive here. See supra ¶ 112.
    The court had the authority under rule 59(d) to grant a new trial
    for reasons not raised by SouthTowne in its new trial motion.
    ¶125 Smith also challenges the merits of the court‘s ruling. She
    asserts that the court‘s objection to Dr. Weaver‘s differential
    diagnosis was factually incorrect because Dr. Weaver did consider
    that Smith lived in her car for a period of time and ruled it out as a
    possible cause of her carbon monoxide poisoning. Smith proffers
    evidence in support of her argument, and again protests that she
    was not given the opportunity to respond to the court‘s concern.
    ¶126 As with Leiss, we do not resolve this issue on the merits.
    Rather, we again find dispositive Smith‘s argument that she did
    not have an adequate opportunity to be heard on this issue.
    Because SouthTowne did not raise this issue in its post-trial
    motion, the court was required to give Smith ―notice and an
    opportunity to be heard‖ before granting the motion for this
    reason. See UTAH R. CIV. P. 59(d). But since SouthTowne did not
    ask for a new trial on this basis, Smith did not have notice prior to
    the hearing that this would be an issue. And although she stated
    at the hearing that the issue had not been briefed and she was
    learning of it for the first time, she was not given any additional
    time to respond to it. Accordingly, we conclude that the
    requirements of rule 59(d) were not met. And we reverse the
    court‘s new trial ruling excluding Dr. Weaver‘s testimony.
    ¶127 The court‘s grant of a new trial was based on its
    exclusion of testimony from Leiss and Dr. Weaver. Because we
    have reversed these underlying rulings, we reverse the
    conditional grant of a new trial in favor of SouthTowne.
    C. SouthTowne’s Cross Appeal
    1. Dr. Weaver
    ¶128 On cross appeal, SouthTowne argues that the district
    court should have excluded Dr. Weaver‘s testimony because he
    failed to reliably apply the methodology of a differential diagnosis
    to account for Smith‘s other illnesses and symptoms around the
    same time she allegedly suffered carbon monoxide poisoning.
    SouthTowne made this argument in its motion for a new trial, and
    the district court rejected it.
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    ¶129 Under Utah Rule of Evidence 702(b)(2), a court may
    exclude expert testimony if that testimony is not based on
    sufficient facts or data. As such, expert testimony must rest on a
    reliable foundation. See Patey v. Lainhart, 
    1999 UT 31
    , ¶ 23,
    
    977 P.2d 1193
    . Speaking specifically about the foundation
    necessary to opine on the issue of causation, in Patey, we
    explained that a ―declaration about causation is inadmissible
    ‗where an expert witness has not testified to sufficient facts on
    which to base his opinion.‘‖ 
    Id.
     (citation omitted). In other words,
    under rule 702, ―[t]he expertise of the witness, his degree of
    familiarity with the necessary facts, and the logical nexus between
    his opinion and the facts adduced must be established.‖ 
    Id.
    (citation omitted).
    ¶130 A differential diagnosis is a presumptively admissible
    diagnostic technique. See Alder, 
    2002 UT 115
    , ¶¶ 62–64
    (―[D]ifferential diagnosis is one of the oldest and most widely
    used and recognized of all [diagnostic] methods.‖). And here, Dr.
    Weaver‘s expert testimony, ―based on accepted and standard
    methods and techniques‖ alongside sufficient facts and data to
    underpin those techniques, does not run afoul of rule 702. See id.
    ¶ 66.
    ¶131 SouthTowne is correct that simple temporal proximity is
    insufficient support for a differential diagnosis.22 See Taylor v.
    Univ. of Utah, 
    2020 UT 21
    , ¶ 56, 
    466 P.3d 124
    . But as the district
    court accurately observed, Dr. Weaver considered more than the
    timing of Smith‘s alleged exposure and her reported symptoms—
    including by conducting an extensive review of Smith‘s medical
    history and preexisting conditions. The court of appeals has found
    such testimony admissible under rule 702 where it is based on
    __________________________________________________________
    22 PLAC also asserts that temporal proximity is an insufficient
    basis for determining causation. But Dr. Weaver considered
    information and data that went beyond the temporal connection
    between Smith‘s alleged carbon monoxide exposure and the onset
    of her symptoms when forming his causation opinion. See supra
    ¶ 121. We are not holding that a causation opinion is per se
    admissible simply because an expert employs a differential
    diagnosis methodology. That methodology must be grounded in
    sufficient facts and data. The district court found that this was the
    case here. And we cannot conclude that it abused its discretion in
    so holding.
    39
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    patient statements, temporal proximity, physical examination,
    and imaging studies. See Majors v. Owens, 
    2015 UT App 306
    , ¶ 20,
    
    365 P.3d 165
    . Similarly here, Dr. Weaver relied on Smith‘s
    statements and recorded medical history, related imaging studies,
    the temporal proximity of her alleged carbon monoxide exposure
    to her constellation of symptoms, and his own physical and
    neurological examination of Smith to conclude that Smith had
    suffered carbon monoxide poisoning during her drive to
    Washington. Based on these facts, we do not disturb the district
    court‘s assessment that it ―cannot conclude that the manner in
    which [Dr. Weaver] conducted his differential medical diagnosis
    was so inappropriate or prejudicial as to require a new trial.‖
    2. Dr. Orrison
    ¶132 Lastly, on cross appeal, SouthTowne argues that the
    district court should not have permitted Smith to rely on the scans
    and related opinions of Dr. Orrison, who ordered an MRI of Smith
    in November 2013 but was unable to testify at trial because he
    passed away prior to its start. Specifically, SouthTowne asks us to
    hold that the district court abused its discretion in (1) failing to
    apply rule 703‘s balancing test when it denied SouthTowne‘s
    motion in limine seeking to exclude Dr. Orrison‘s scans, and
    (2) failing to grant SouthTowne a new trial based on the improper
    introduction of evidence of Dr. Orrison‘s assessment.
    ¶133 But the district court‘s ruling was correct. As
    SouthTowne notes in its brief, ―[a]s a general principle, medical
    experts often rely on data provided by specialists from other
    fields, treating providers, or data obtained from imaging scans or
    diagnostic tests.‖ And, as mentioned, under rule 703, expert
    opinion may be based on otherwise inadmissible ―facts or data‖
    that the expert has been made aware of provided that other
    ―experts in the particular field would reasonably rely on those
    kinds of facts or data in forming an opinion on the subject.‖ UTAH.
    R. EVID. 703. In fact, ―[m]uch of what experts rely upon in
    formulating opinions is inadmissible evidence.‖ Patey, 
    1999 UT 31
    ,
    ¶ 33; see also State v. Kelley, 
    2000 UT 41
    , ¶ 23, 
    1 P.3d 546
     (noting
    that we have held expert testimony based on psychological and
    medical records not performed by the testifying expert to be
    admissible). And while rule 703 cannot be used to circumvent
    other rules of evidence, ―experts may recite hearsay evidence in
    order to lay a foundation for the opinions they give to the jury,‖
    Patey, 
    1999 UT 31
    , ¶ 33, provided the ―probative value in helping
    40
    Cite as: 
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    Opinion of the Court
    the jury evaluate the opinion substantially outweighs [any]
    prejudicial effect.‖ UTAH R. EVID. 703.
    ¶134 SouthTowne does not contest that Dr. Orrison was
    qualified to order and interpret the results of Smith‘s brain
    imaging. Nor does it dispute that MRI reports are reasonably
    relied on by experts in the field as part of the diagnostic process.
    As the district court aptly pointed out, SouthTowne‘s own
    medical expert relied on the records and opinions of other
    non-testifying experts in this case—including that of Dr. Orrison.
    And while the ―opposing party may challenge the suitability or
    reliability of such materials on cross-examination, [any] such
    challenge goes to the weight to be given the testimony, not to its
    admissibility.‖ Green v. Louder, 
    2001 UT 62
    , ¶ 28, 
    29 P.3d 638
    (emphasis omitted) (citation omitted).
    ¶135 Importantly, SouthTowne overstates the extent to which
    Smith‘s medical experts relied on the findings of Dr. Orrison.
    Neither the scans Dr. Orrison ordered, nor his report of the scan
    findings were entered into evidence. As noted, Dr. Weaver
    provided medical testimony about the magnitude of Smith‘s
    injuries and opined on the cause of those injuries. See supra ¶ 121.
    But although Dr. Weaver based his conclusions in part on the
    report created by Dr. Orrison, he also interpreted Smith‘s imaging
    himself;23 conducted his own interview with and physical
    examination of Smith; and, coupled with his extensive personal
    experience in the field, relied on his knowledge of the events
    surrounding Smith‘s alleged carbon monoxide poisoning in
    forming his opinion.
    ¶136 The district court found that because ―[Dr.] Weaver used
    the report in forming [his own] opinions regarding [Smith], and
    because such evidence is the type that is reasonably relied on by
    experts in the field,‖ any potential prejudice to SouthTowne ―was
    outweighed by the probative value in assisting the jury to
    evaluate the opinions at issue.‖ We review legal standards
    applied by the district court for correctness. State v. Bess,
    
    2019 UT 70
    , ¶ 17, 
    473 P.3d 157
    . And here, the district court was
    correct in its application of rule 703 to its admissibility
    __________________________________________________________
    23 Indeed, in its motion for a new trial, SouthTowne argued
    that Dr. Weaver lacked sufficient qualifications to opine on
    Smith‘s brain imaging. The district court correctly held this
    argument specious.
    41
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    determination regarding Dr. Orrison‘s reports and scans.
    Accordingly, we affirm the district court‘s evidentiary rulings
    with respect to Dr. Orrison.
    ¶137 In sum, we reverse the underlying bases for the district
    court‘s conditional grant of a new trial, and therefore we reverse
    the district court‘s conditional new trial order. Further, we affirm
    the district court‘s rejection of SouthTowne‘s alternative
    arguments for a new trial with respect to Dr. Weaver and Dr.
    Orrison‘s scans and opinions. Accordingly, SouthTowne‘s request
    that we correct these evidentiary rulings in the event of a new trial
    is moot. And as we have explained, those arguments would
    nevertheless fail on the merits.
    III. RULE 60(B) MOTION
    ¶138 Finally, Smith argues the district court should have
    dismissed SouthTowne‘s motion to set aside the judgment under
    rule 60(b) as untimely. We agree.
    ¶139 On November 21, 2018—fifty-eight days after the district
    court entered judgment in favor of Smith—SouthTowne moved
    for relief from judgment under rules 60(b)(2) and (6) of the Utah
    Rules of Civil Procedure. Rule 60(b) allows a court to ―relieve a
    party or its legal representative from a judgment, order, or
    proceeding‖ for any of the enumerated reasons listed in
    subsections (1) through (5)—including, under subsection (2),
    ―newly discovered evidence which by due diligence could not
    have been discovered in time to move for a new trial under Rule
    59(b)‖—or for ―any other reason that justifies relief‖ as provided
    by subsection (6). UTAH R. CIV. P. 60(b).
    ¶140 A rule 60(b) motion ―must be filed within a reasonable
    time,‖ and, if predicated on ―one of the reasons [listed] in
    paragraph (b)(1), (2), or (3), not more than 90 days after entry of
    the judgment or order . . . .‖ UTAH R. CIV. P. 60(c). Rule 60(b)(2)
    contains an additional, internal time limit. Under rule 60(b)(2), a
    district court may set aside a judgement based on newly
    discovered evidence ―which by due diligence could not have been
    discovered in time to move for a new trial under [r]ule 59(b).‖ 
    Id. 60
    (b)(2) (emphasis added). Thus, while a motion under 60(b)(2)
    must be filed ―not more than 90 days after entry of the judgment,‖
    
    id. 60
    (c), if the evidence could have been discovered in time to
    move for a new trial under rule 59(b), the motion is subject to that
    rule‘s strict twenty-eight-day time limit. See 
    id. 59
    (b) (―A motion
    for a new trial must be filed no later than 28 days after entry of the
    judgment.‖).
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    Opinion of the Court
    ¶141 SouthTowne‘s rule 60(b) motion asserted that two jurors
    engaged in misconduct because they allegedly ―concealed
    material bias‖ against Volkswagen. While SouthTowne largely
    argued its 60(b) motion under subsection (2)‘s ―newly discovered
    evidence‖ exception to the strict twenty-eight-day deadline of rule
    59, it reasoned that, if the court found that ―the request does not
    fall within [r]ule 60(b)(2), then . . . the misconduct would be one of
    the ‗unusual and exceptional circumstances‘ justifying relief
    under [the catchall provision of] subparagraph (6).‖
    ¶142 The district court declined to reach the merits of
    SouthTowne‘s rule 60(b) motion, concluding that an evidentiary
    hearing was necessary to ―resolve . . . competing [juror]
    testimony‖ under the McDonough standard,24 but that such a
    hearing was unwarranted because the court had already granted
    SouthTowne a new trial on other grounds. In reaching this
    conclusion, the court excused the untimeliness of SouthTowne‘s
    filing date, noting that while the motion might have been
    untimely under the rubric of 60(b)(2), ―60(b)(6) is not limited or
    otherwise prescribed by the same timeframe,‖ and SouthTowne
    had brought the motion pursuant to both subsections.
    ¶143 But ―[r]ule 60(b)(6) is designed to remedy a judgment
    [only] when exceptional circumstances are present.‖ Menzies v.
    Galetka, 
    2006 UT 81
    , ¶ 77, 
    150 P.3d 480
    ; see also Kell v. State,
    
    2012 UT 25
    , ¶ 18, 
    285 P.3d 1133
     (―Subsection (6) [of rule 60(b)],
    particularly, should be very cautiously and sparingly invoked by
    the [c]ourt only in unusual and exceptional circumstances.‖
    (second alteration in original) (citation omitted) (internal
    quotation marks omitted)). And ―[a] party may not resort to
    subsection (6)‘s catchall provision when the grounds for relief fall
    within subsections (1) through (5),‖ Carter v. State, 
    2015 UT 38
    ,
    ¶ 17, 
    345 P.3d 737
    ; see also Laub v. S. Cent. Utah Tel. Ass’n, Inc.,
    
    657 P.2d 1304
    , 1306–07 (Utah 1982) (holding that the residuary
    clause of rule 60(b) may be employed only if the ground asserted
    for relief is ―one other than those listed in [the preceding]
    __________________________________________________________
    24 In State v. Thomas, this court adopted the two-part test
    articulated by the United States Supreme Court in McDonough
    Power Equipment, Inc. v. Greenwood, 
    464 U.S. 548
     (1984) to
    determine when a juror‘s failure to answer honestly a question on
    voir dire entitles the defendant to a new trial. 
    830 P.2d 243
    , 245
    (Utah 1992).
    43
    SMITH v. VOLKSWAGEN SOUTHTOWNE, INC.
    Opinion of the Court
    subdivisions‖). ―Otherwise, a party could use subsection (6) to
    circumvent the ninety-day time limitation for filing motions
    grounded in the reasons set forth in subsections (1) through (3).‖
    Carter, 
    2015 UT 38
    , ¶ 17; see also Kanzee v. Kanzee, 
    668 P.2d 495
    , 497
    (Utah 1983) (holding that, because appellant asserted grounds for
    relief that were listed in rule 60(b)(1), the appellant was ―not
    entitled to use [the rule‘s residuary clause] to circumvent the
    three-month limitation‖).
    ¶144 Here, the substance of SouthTowne‘s motion, alleging
    juror misconduct based on newly discovered evidence, falls
    squarely within the ambit of subsection (2). As such, SouthTowne
    had to satisfy rule 60(b)(2)‘s timing requirements.
    ¶145 SouthTowne argues that we should not rule on Smith‘s
    challenge to its rule 60(b) motion because the issue is moot, and
    ―[i]f this court reaches the issue, it should hold that the district
    court did not abuse its discretion in concluding that
    SouthTowne‘s motion was timely, and remand for an evidentiary
    hearing.‖ But the record shows that SouthTowne had notice of the
    basis of its allegations before judgment was entered and five
    months before it filed its rule 60 motion. While we could remand
    to have the district court consider SouthTowne‘s motion under
    rule 60(b)(2), for the sake of judicial economy, we use the record
    evidence to do so here instead.
    ¶146 The trial in this case ended on June 20, 2018. One day
    later, a juror informed one of SouthTowne‘s paralegals about
    concerns of misconduct by another juror. On August 27, 2018—
    sixty-eight days after SouthTowne first heard concerns about
    potential juror misconduct—the district court entered judgment in
    favor of Smith, starting the twenty-eight-day clock for new trial
    motions under rule 59. So from the day SouthTowne first had
    notice of potential juror misconduct, it had roughly ninety-seven
    days to investigate and file a motion under rule 59.25 However,
    __________________________________________________________
    25 SouthTowne argues that it spent this time attempting to
    corroborate the reporting juror‘s statements. But records indicate
    that by August 18, 2018, after initial attempts failed, SouthTowne
    ceased efforts to contact the rest of the jury panel. And while
    SouthTowne finally received corroboration from a second juror on
    October 4, 2018, SouthTowne did not follow up with the original,
    reporting juror to get her full statement and declaration until
    November 14, 2018—a full 40 days later, and nearly five months
    (continued . . .)
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    SouthTowne elected to pursue other avenues of relief from
    judgment instead. This was a perfectly legitimate choice. But it is
    insufficient to establish that ―by due diligence‖ the evidence of
    juror misconduct ―could not have been discovered in time to
    move for a new trial under [r]ule 59(b).‖ Accordingly,
    SouthTowne did not meet the requirements of rule 60(b)(2) and
    was required to raise these allegations by the new trial deadline.
    Because it did not do so, its rule 60(b) motion must be dismissed
    as untimely.
    CONCLUSION
    ¶147 We reverse the district court‘s grant of judgment as a
    matter of law to SouthTowne because the cumulative evidence
    adduced at trial was legally sufficient to satisfy the element of
    causation. However, we affirm the court‘s rejection of
    SouthTowne‘s argument that it was entitled to judgment as a
    matter of law because Smith had produced insufficient evidence
    of the standard of care.
    ¶148 We also reverse the court‘s conditional grant of a new
    trial to SouthTowne because the court‘s ruling was based on
    issues that SouthTowne did not raise in its new trial motion, and
    Smith was not given notice and an opportunity to be heard on the
    new issues. However, we affirm the court‘s rejection of
    SouthTowne‘s argument that it was entitled to a new trial because
    of the improper admission of portions of Dr. Weaver‘s testimony
    and Dr. Orrison‘s scans and opinions.
    ¶149 Finally, we conclude that SouthTowne‘s rule 60(b)
    motion must be dismissed as untimely.
    ¶150 Accordingly, we reverse in part, affirm in part, and order
    the jury‘s verdict reinstated.
    after the juror had initially expressed concern over potential
    misconduct.
    45