Randall Thomsen, Petitioners/cross-resps. v. Terence Butler, Resp./cross-petitioner ( 2018 )


Menu:
  •                                                                                                   F Lii
    COURI OFpPPE~J$,°1’ I
    STATE Or WAShINUTO 4
    20180E631 Ml 8:56
    IN THE COURT OF APPEALS OF THE STATE OF WASHINGTON
    TERENCE BUTLER,
    DIVISION ONE
    Respondent/Cross-Petitioner,
    No. 76536-1-I
    v.
    UNPUBLISHED OPINION
    RANDALL T. THOMSEN, individually
    and on behalf of the marital community
    comprised of RANDALL THOMSEN
    and JANE DOE THOMSEN, and
    CALFO HARRIGAN LEYH & EAKES,                                                          )
    LLP, a Washington Professional
    Limited Liability Partnership, f/k/a/
    DANIELSON HARRIGAN LEYH &
    TOLLEFSON, LLP,                                                                       )
    )
    Petitioners/Cross-Respondents.                                          )     FILED: December 31, 2018
    ___________________________________________________________________________________   )
    DWYER, J.             —      Terence Butler sued his former attorney, Randall Thomsen,
    and his former attorney’s firm, Calfo Harrigan Leyh & Eakes, LLP (collectively
    Thomsen), for legal malpractice. Following hearings on cross motions for
    summary judgment, the trial court ruled that Thomsen breached the standard of
    care as a matter of law, but declined to dismiss Thomsen’s affirmative defense of
    third party fault or to rule that collateral estoppel barred certain of Butler’s alleged
    theories of causation. We granted discretionary review and now reverse the trial
    court’s rulings that Thomsen breached the standard of care and that collateral
    No. 76536-1-1/2
    estoppel did not bar Butler’s alleged theories of causation arising from breach of
    fiduciary duty and statutory wage claims.
    In 2010, ImageSource, a document imaging company, had four equal
    shareholders: Shadrach White, Victor Zvirzdys, Terry Sutherland, and Terence
    Butler. Butler discovered that his co-owners had received substantially greater
    personal payments from the company than he had received. In 2011, the co
    owners all agreed to ‘level out” Butler by having ImageSource pay him amounts
    to match the expenditures the company had made to the other owners. Butler
    agreed to wait to receive the payments until the company was performing well.
    Shortly thereafter, White left the company and filed a lawsuit (White)
    against ImageSource and his three former co-owners. Butler, Sutherland, and
    Zvirzdys retained Thomsen to jointly represent them in defense of the White
    lawsuit. In mediation, the parties successfully reached an agreement to settle
    the lawsuit. They memorialized their settlement in a written CR 2A agreement.
    In pertinent part, this agreement stated that “Mr. White agrees to release all
    defendants from any claims that he may possess against them. Defendants
    agree to release Mr. White from any claims that they may possess against him.”
    White’s attorney offered to draft a more detailed agreement that would “be
    consistent with the CR 2A, but include the more detailed language and items we
    did not include in the summary agreement.” The final release and settlement
    agreement (White Release) stated:
    In consideration of the promises set forth herein, the Parties agree
    to release one another, their spouses, their respective heirs,
    -2-
    No. 76536-1-1/3
    agents, attorneys, employees, directors, heirs, assigns and
    personal representatives from any and all charges, claims and
    actions, whether known or unknown, arising prior to the date of this
    Agreement and arising directly or indirectly out of the Lawsuit or
    their previous dealings.
    Butler, Sutherland, White, and Zvirzdys all signed the White Release.
    After the settlement of the White lawsuit, Butler believed that ImageSource
    was performing sufficiently well to commence paying him pursuant to the ‘level
    out” agreement he had reached with his co-owners. Sutherland and Zvirzdys
    objected. Butler hired an attorney, Mario Bianchi, who filed a lawsuit (Butler)
    against Sutherland, Zvirzdys, and ImageSource. In this suit, Butler demanded
    payment pursuant to the level out agreement and advanced several other claims,
    including breach of fiduciary duty and statutory wage claims.
    Butler brought a motion seeking summary judgment against his co-owners
    on his breach of fiduciary duty and his statutory wage claims. In response,
    Sutherland and Zvirzdys argued that the trial court should grant summary
    judgment against Butler on his breach of fiduciary duty and statutory wage claims
    and should also dismiss all of Butler’s claims that arose prior to the White lawsuit.
    According to Sutherland and Zvirzdys, Butler voluntarily released all such claims
    by signing the White Release.
    In reply, Butler argued that Sutherland and Zvirzdys were misinterpreting
    the release and that the White Release did not release his claims against them.
    Butler contended that there was no consideration for the release of claims
    amongst Butler, Sutherland, Zvirzdys, and ImageSource in the White Release.
    However, Butler did not assert that Washington law, as explained in Berg v.
    -3-
    No. 76536-1-1/4
    Hudesman, 
    115 Wn.2d 657
    , 
    801 P.2d 222
     (1990), permitted him to introduce
    extrinsic evidence of the intent of the signatories to the White Release.
    The Butler court rejected Butler’s arguments and granted partial summary
    judgment against him. The court granted summary judgment against Butler as to
    his breach of fiduciary duty and statutory wage claims and also held that Butler
    released any claims related to the “level out” agreement when he signed the
    White Release. Butler neither sought discretionary review of the rulings nor
    chose to litigate the case to final judgment and appeal the adverse rulings.
    Rather, 11 months later, he settled the case.
    Butler then filed suit against Thomsen, claiming that he committed
    malpractice in reviewing and approving the White Release by failing to notice that
    its language released Butler’s claims against Sutherland, Zvirzdys, and
    lmageSource.1 In the trial court, Butler moved for summary judgment dismissal
    of various affirmative defenses raised by Thomsen, including third party fault,2
    and for summary judgment that Thomsen breached the standard of care as a
    matter of law when reviewing the White Release. Thomsen filed his own motion
    for summary judgment on the issue of causation, asserting that Butler should be
    collaterally estopped from relitigating his breach of fiduciary duty and statutory
    wage claims. Both parties provided declarations from experts in support of their
    motions and in opposition to those of their opponents.
    This is not the first time we have been asked to resolve an issue in this matter. In an
    unpublished opinion, Butlerv, Thomsen, No. 74258-2-I (Wash. Ct. App. Aug. 29, 2016)
    (unpublished), http://www.courts.wa.gov/opinions/pdf/742582.pdf, we held that the White Release
    did not compel Butler to resolve this dispute with Thomsen through arbitration.
    2 Specifically, that Butler’s attorney in the Butler litigation, Mario Bianchi, committed
    malpractice.
    -4-
    No. 76536-1-1/5
    The trial court granted partial summary judgment, holding that Thomsen
    breached the standard of care as a matter of law, but refused to strike
    Thomsen’s affirmative defense of third party fault. The trial court denied
    Thomsen’s motion for summary judgment based on collateral estoppel. We
    granted discretionary review.
    Thomsen contends that the trial court erred by denying his motion for
    summary judgment on certain issues of causation. This is so, Thomsen asserts,
    because collateral estoppel barred Butler from relitigating his underlying breach
    of fiduciary duty and statutory wage claims from the Butler litigation. In response,
    Butler avers that application of the doctrine of collateral estoppel is inappropriate
    herein because there was no final judgment in the Butler litigation and because
    the application of the doctrine would work an injustice. We disagree.
    We ‘review a summary judgment ruling de novo and consider the same
    evidence heard by the trial court, viewing that evidence in a light most favorable
    to the party responding to the summary judgment [motion].” Slack v. Luke, 
    192 Wn. App. 909
    , 915, 
    370 P.3d 49
    (2016) (citing Lybbertv. Grant County, 
    141 Wn.2d 29
    , 34, 
    1 P.3d 1124
     (2000)). “A court may grant summary judgment if the
    pleadings, affidavits, and depositions establish that there is no genuine issue as
    to any material fact and the moving party is entitled to judgment as a matter of
    law.” Lybbert, 141 Wn.2d at 34. “A material fact is one that affects the outcome
    of the litigation.” Owen v. Burlington N. & Santa Fe R.R., 
    153 Wn.2d 780
    , 789,
    
    108 P.3d 1220
     (2005). “While questions of fact typically are left to the trial
    -5-
    No. 76536-1-1/6
    process, they may be treated as a matter of law if ‘reasonable minds could reach
    but one conclusion’ from the facts.” Slack, 192 Wn. App. at 916 (quoting Hartley
    v. State, 
    103 Wn.2d 768
    , 775, 
    698 P.2d 77
     (1985)).
    In a professional negligence action alleging legal malpractice, “the plaintiff
    must show (1) the existence of an attorney-client relationship that gives rise to a
    duty of care, (2) an act or omission by the attorney in breach of that duty, (3)
    damage to the client, and (4) proximate causation between the breach of duty
    and the damage incurred.” Slack, 192 Wn. App. at 916 (citing Hizey v.
    Carpenter, 
    119 Wn.2d 251
    , 260-61, 
    830 P.2d 646
     (1992)). “General principles of
    causation are no different in a legal malpractice action than in an ordinary
    negligence case.” Halvorsen v. Ferguson, 
    46 Wn. App. 708
    , 719, 
    735 P.2d 675
    (1986). Proximate cause is shown through proof that, but for the attorney’s
    negligence, the plaintiff would have prevailed or at least achieved a better result.
    Halvorsen, 
    46 Wn. App. at 719
    .
    The doctrine of collateral estoppel applies when the following four
    elements are met: “(1) identical issues; (2) a final judgment on the merits; (3) the
    party against whom the plea is asserted must have been a party to or in privity
    with a party to the prior adjudication; and (4) application of the doctrine must not
    work an injustice on the party against whom the doctrine is to be applied.”
    Malland v. Dep’t of Ret. Sys., 
    103 Wn.2d 484
    , 489, 
    694 P.2d 16
     (1985).
    ‘Whether collateral estoppel applies to preclude relitigation of an issue is a
    question of law that we review de novo.” LeMond v. Dept of Licensing, 143 Wn.
    -6-
    No. 76536-1-1/
    7 App. 797
    , 803, 
    180 P.3d 829
     (2008) (citing State v. Vasguez, lO9Wn. App. 310,
    314, 
    34 P.3d 1255
     (2001)).
    The finality required for a judgment to be appealed is not the same as the
    finality required for purposes of applying collateral estoppel. Cunningham v.
    State, 
    61 Wn. App. 562
    , 566, 
    811 P.2d 225
     (1991). To determine whether a
    judgment is sufficiently final to invoke collateral estoppel, we consider whether
    the decision was adequately deliberated, whether it was firm rather than
    tentative, whether the parties were fully heard, whether the court supported its
    decision with a reasoned opinion, and whether the decision was subject to
    appeal or was reviewed on appeal. Cunningham, 
    61 Wn. App. at
    567 (citing
    RESTATEMENT (SECOND) OF JUDGMENTS         § 13, cmt.   g (AM. LAW INST. 1982)). Issues
    that have been decided on summary judgment may, depending on an analysis of
    the different factors, be considered to have been decided with sufficient finality.
    Cunningham, 
    61 Wn. App. at 567-68
    . That a party settles a case following a
    judgment does not prevent said judgment from satisfying the final judgment
    requirement. Nielson v. Spanaway Gen. Med. Clinic, Inc., 
    135 Wn.2d 255
    , 263-
    64, 
    956 P.2d 312
     (1998). See also In re Dependency of H.S., 
    188 Wn. App. 654
    ,
    660-61, 
    356 P.3d 202
     (2015); Bunce Rental, Inc. v. Clark Equip. Co., 42Wn.
    App. 644, 648, 
    713 P.2d 128
     (1986).
    “Collateral estoppel is, in the end, an equitable doctrine that will not be
    applied mechanically to work an injustice.” Hadley v. Maxwell, 
    144 Wn.2d 306
    ,
    315, 
    27 P.3d 600
     (2001). “[T]he party against whom the doctrine is asserted
    must have had a full and fair opportunity to litigate the issue in the first forum.”
    -7-
    No. 76536-1-1/8
    Christensen v. Grant County Hoso. Dist. No. 1, 
    152 Wn.2d 299
    , 309, 
    96 P.3d 957
    (2004). Not only must there have been an opportunity to fully litigate, the party
    against whom the estoppel is asserted must have had “interests at stake that
    would call for a full litigational effort.” Hadley, 
    144 Wn.2d at 312
     (quoting LEwIs
    H. ORLAND & KARL B. TEGLAND, WASHINGTON PRAcTIcE: TRIAL PRAcTIcE, CIVIL                       §
    373, at 763 (5th ed. 1996)). Indeed, as we have recently reiterated, “for collateral
    estoppel to apply, the party must have had ‘sufficient motivation for a full and
    vigorous litigation of the issue.” Weaver v. City of Everett, 4 Wn. App. 2d 303,
    316, 
    421 P.3d 1013
     (2018) (quoting Hadley, 
    144 Wn.2d at 315
    ).
    However, it would work an injustice to apply collateral estoppel when “a
    new determination is warranted in order to take account of an intervening change
    in the applicable legal context.” In re Estate of Hambleton, 
    181 Wn.2d 802
    , 835,
    
    335 P.3d 398
     (2014) (quoting RESTATEMENT (SECOND) OF JUDGMENTS                       § 28(2)(b)
    (AM. LAw INST. 1982)). “[Cjollateral estoppel is meant to apply only in situations
    that ‘have remained substantially static, factually and legally..” Dot Foods, Inc. v.
    Dep’t of Revenue, 
    185 Wn.2d 239
    , 256, 
    372 P.3d 747
     (2016) (quoting C.I.R. v.
    Sunnen, 
    333 U.S. 591
    , 599, 688. Ct. 715, 
    92 L. Ed. 898
     (1948)).
    The parties dispute whether collateral estoppel bars Butler from asserting
    a theory of causation premised upon breach of fiduciary duty and statutory wage
    claims previously dismissed on summary judgment by the Butler court.3 The
    ~ Thomsen seeks the application of collateral estoppel to Butler’s breach of fiduciary duty
    and statutory wage claims because application of the doctrine strips Butler of a significant portion
    of his claimed damages. If Butler had lost on his breach of fiduciary duty and statutory wage
    claims because of the White Release, he could bring a claim against Thomsen to recover what he
    would otherwise have recovered for such claims in the Butler litigation. However, when, as
    occurred here, Butler’s breach of fiduciary duty and statutory wage claims failed for reasons other
    -8-
    No. 76536-1-1/9
    parties agree that the first and third elements of collateral estoppel are met, but
    Butler incorrectly asserts that there was no final judgment and that the
    application of collateral estoppel would work an injustice.
    The partial summary judgment4 in Butler was not tentative, Butler provided
    full briefing on the issues to the Butler court, and the judge supported her ruling
    with a reasoned written decision. Furthermore, Butler had the opportunity to
    seek discretionary review of the decision or to file an appeal after entry of final
    judgment on all claims. The Butler court’s ruling was therefore sufficiently firm to
    constitute a final judgment for the purpose of applying collateral estoppel.
    Similarly, the application of collateral estoppel to Butler’s causation claims
    would not work an injustice because Butler had a full and fair opportunity to
    litigate the issues in Butler. Butler brought the motion which resulted in the
    summary judgment order he now seeks to avoid. There can be no doubt that he
    was properly motivated to engage in a full litigational effort to prevail on his
    motion as he was seeking over one million dollars in damages. While before the
    trial court in this matter, Butler’s counsel conceded that Butler had the
    opportunity to seek discretionary review in the Butter litigation but decided not to
    do so. Furthermore, Butler could have seen the matter through to final judgment
    and then appealed the decisions as a matter of right.5 ~ RAP 2.2.
    than the White Release, Butler cannot then seek to recover for those claims on the ground that
    Thomsen committed malpractice when reviewing the language of the White Release.
    ~ Butler, citing to an unpublished case from Division Two, mistakenly addresses most of
    his argument on this issue toward the notion that settlements cannot constitute final judgments.
    One reason this argument is inapposite is because the final judgment relied upon by Thomsen to
    argue for the application of collateral estoppel is the partial summary judgment order, not the
    subsequent settlement agreement.
    ~ Indeed, Butler’s decision to settle his claims against his former co-owners and shift his
    litigation efforts to a lawsuit against his former lawyer, with the hope or expectation that he would
    -9-
    No. 76536-1-1/10
    Butler asserts that substantive changes in the law regarding his statutory
    wage claims would make the application of collateral estoppel to a ruling made
    prior to the change unjust.6 Specifically, Butler avers that our Supreme Court’s
    holding in LaCoursiere v. Camwest Dev., Inc., 
    181 Wn.2d 734
    , 
    339 P.3d 963
    (2014), published subsequent to the Butler court’s ruling, changed the law upon
    which the Butler court based its ruling.7 Therefore, according to Butler, it would
    be unjust to hold him to the Butler court’s now legally erroneous ruling.
    However, the LaCoursiere decision was published only a few months
    subsequent to the Butler court’s ruling and almost a year before Butler settled the
    Butler litigation.8 Butler had sufficient opportunity to bring the LaCoursiere
    decision to the attention of the trial court,9 to seek discretionary review in light of
    the LaCoursiere decision, or to proceed with the litigation and file an appeal
    subsequent to final judgment on all claims. He chose not to exercise those
    be able to litigate anew the issues presented, appears to be the result of a tactical decision,
    rather than one borne of an inability to see the Butler litigation through to fruition.
    ~ Butler also contends that the Butler court made a substantive error in its ruling
    regarding his breach of fiduciary duty claim, specifically by ruling that the cause of action
    belonged to the business and, thus, he lacked standing to bring such a claim. He asserts that it
    would be unjust to hold him to such an erroneous ruling. However, the inquiry we conduct herein
    is concerned only with the opportunity and incentive to fully litigate issues, not with the quality of
    the decision reached. Butler had the opportunity to seek review of any rulings he believed to be
    erroneous, and cannot now use his decision not to do so as a shield to block the application of
    collateral estoppel and obtain a second bite at the litigation apple.
    ~ Such an argument mistakes a change in the law with a change in the interpretation of
    existing law. No new statute was passed; the only change in the applicable legal context was the
    interpretation of an existing statute.
    8 The Butler ruling in question was dated August 15, 2014. The LaCoursiere decision
    was published on October 23, 2014. 181 Wn,2d 734. Butler did not settle the Butler case until
    September of 2015.
    ~ Pursuant to CR 54(b), the Butler court retained the power to revise its interlocutory
    rulings at any time prior to the final adjudication of all claims.
    -10-
    No. 76536-1-I/Il
    options.1° The application of collateral estoppel to these claims works no
    injustice.
    Ill
    Thomsen next contends thatthe trial court erred by ruling that he
    breached the applicable standard of care as a matter of law. This is so,
    Thomsen asserts, because he presented expert testimony that established a
    genuine dispute of material fact regarding whether Thomsen breached the
    standard of care under the circumstances. In response, Butler asserts that
    Thomsen’s expert’s testimony is inadmissible evidence and that expert testimony
    was unnecessary to establish a breach of the standard of care under the
    circumstances. Thomsen has the better argument.
    The standard of care applicable to all cases of professional negligence
    involving the practice of law is “that degree of care, skill, diligence and knowledge
    commonly possessed and exercised by a reasonable, careful and prudent lawyer
    in the practice of law in this jurisdiction.” Cook, Flanagan & Berst v. Clausing, 
    73 Wn.2d 393
    , 395, 
    438 P.2d 865
     (1968). Thus, to breach the duty of care, an
    attorney “must fail to exercise ‘the degree of care, skill, diligence, and knowledge
    commonly possessed and exercised by a reasonable, careful, and prudent
    lawyer in the practice of law” in Washington. Geer v. Tonnon, 
    137 Wn. App. 838
    , 850-51, 
    155 P.3d 163
     (2007) (quoting Hizey, 
    119 Wn.2d at 261
    ). Breach of
    the standard of care is generally a question of fact, but if reasonable minds could
    10 Because Butler had, despite choosing to forgo it, a full and fair opportunity to litigate
    the issue of LaCoursiere’s applicability to his statutory wage claims, we need not reach the
    parties arguments regarding the applicability of LaCoursiere to the claims raised.
    -11-
    No. 76536-1-1/12
    not differ on the question, breach may also be determined as a matter of law.
    Smith v. Preston Gates Ellis, LLP, 
    135 Wn. App. 859
    , 864, 
    147 P.3d 600
     (2006).
    Because the law can be a “highly technical field beyond the knowledge of
    the ordinary person,” Walker v. Bangs, 
    92 Wn.2d 854
    , 857, 
    601 P.2d 1279
    (1979) (citing Lynch v. Republic Publ’g Co., 
    40 Wn.2d 379
    , 389, 
    243 P.2d 636
    (1952)), expert testimony is often required to determine whether an attorney’s
    duty of care was breached in a legal professional negligence action. Geer, 137
    Wn. App. at 851. However, such expert testimony is not required where the
    breach is such that it could fairly be considered within the common knowledge of
    laypersons. Walker, 
    92 Wn.2d at 858
    .
    Several other common principles inform our inquiry. “[E]vidence
    submitted in opposition to summary judgment must be admissible.” SentinelC3,
    Inc. v. Hunt, 
    181 Wn.2d 127
    , 141, 
    331 P.3d 40
    (2014). “[T]o preclude summary
    judgment, an expert’s affidavit must include more than mere speculation or
    conclusory statements.” Cho v. City of Seattle, 
    185 Wn. App. 10
    , 20, 
    341 P.3d 309
     (2014).
    In addition, “[t]he cardinal rule with which all [contract] interpretation
    begins is that its purpose is to ascertain the intention of the parties.” Berg, 
    115 Wn.2d at 663
     (quoting Corbin, The Interpretation of Words and the Parol
    Evidence Rule, 50 CORNELL L. QLJAR. 161, 162 (1965)). In Berg, our Supreme
    Court held that “extrinsic evidence is admissible as to the entire circumstances
    under which the contract was made, as an aid in ascertaining the parties’ intent.”
    
    115 Wn.2d at 667
    . The court quoted directly from the Restatement (Second) of
    -   12-
    No. 76536-1-1/13
    Contracts, stating that the correct interpretation of a contract is determined “by
    the trier of fact if it depends on the credibility of extrinsic evidence or on a choice
    among reasonable inferences to be drawn from extrinsic evidence.” Berg, 
    115 Wn.2d at 668
     (quoting RESTATEMENT (SECOND) OF CONTRACTS § 212(2) (AM. LAW
    INST. 1981)). Again quoting from the Restatement, the court explained that this
    rule “is not limited to cases where it is determined that the language used [in the
    contract] is ambiguous.” Berg, 
    115 Wn.2d at 668
     (quoting RESTATEMENT~212
    cmt. b).
    Thomsen first asserts that he presented evidence to show that he did not
    breach the standard of care. This is so, he avers, because his expert witness
    opined that the White Release did not release claims amongst Butler,
    Sutherland, and Zvirzdys. To support his opinion, Thomsen’s expert relied upon
    extrinsic evidence, including the prior CR 2A agreement, an e-mail exchange
    between Thomsen and White’s attorney specifying that the White Release be
    consistent with the CR 2A agreement, and the preamble to the settlement
    agreement.
    In response, Butler contends that such evidence contradicts the writing
    and is inadmissible here because the language of the White Release is not
    ambiguous. To Butler, it follows that expert testimony based upon such extrinsic
    evidence must also be inadmissible.
    To the contrary, Berg clearly states that extrinsic evidence may be
    admissible to interpret unambiguous contract language. 
    115 Wn.2d at 668
    .
    Thus, the extrinsic evidence was properly relied upon by Thomsen’s expert,
    -13-
    No. 76536-1-1/14
    whose opinion raised questions of fact regarding the appropriate inferences to
    draw from the language of the CR 2A agreement and the White Release. This
    evidence was sufficient to establish a disputed genuine issue of material fact
    regarding the correct interpretation of the White Release.11
    Thomsen next asserts that he presented expert opinion evidence tending
    to prove that, under the circumstances, Thomsen did not breach the applicable
    standard of care even if the White Release did release claims amongst Butler,
    Sutherland, and Zvirzdysi2 Thomsen’s expert opined that, given the
    circumstances of joint representation in a complex business litigation matter, if
    there was a mistake made in drafting or accepting the White Release, such a
    mistake was reasonable, Thomsen’s expert based this opinion primarily on facts
    alleged in Thomsen’s affidavit, specifically that Butler told Thomsen that there
    ~ Butler appears to also suggest that we should place at least some weight on the Butler
    court’s ruling that the Release did, in fact, release all claims amongst Butler, Sutherland, and
    Zvirzdys. However, that ruling is not binding on Thomsen as he was not a party to the Butler
    litigation and did not have an opportunity to litigate the issue in that case.
    12 Thomsen also asserts that he exercised judgment when reviewing and approving the
    White Release and that such judgment is protected by the attorney judgment rule expressed in
    clark county Fire Dist. No. 5 v. Bullivant Houser Bailey PC, 
    180 Wn. App. 689
    , 
    324 P.3d 743
    (2014). Thomsen presumably seeks to qualify the alleged mistake as an exercise of judgment
    because “[i]n general, mere errors in judgment or in trial tactics do not subject an attorney to
    liability for legal malpractice.” Halvorsen, 
    46 Wn. App. at 717
    . In response, Butler contends that
    Thomsen merely failed to notice the difference between the language of the CR 2A agreement
    and the White Release and to take appropriate measures to address the differences, Butler
    further reasons that such failure did not involve an exercise of judgment and, thus, the attorney
    judgment rule is inapplicable. Our review of the record indicates that Butler is correct; Thomsen
    did not consider that the pertinent section of the White Release may have expressed something
    different than the intent expressed in the CR 2A agreement before advising his clients to sign.
    However, regardless of whether such an alleged mistake required the exercise of
    judgment, that does not change the standard of care or that which constitutes a breach of the
    standard of care in a professional negligence action. The question of breach remains the same:
    Was Thomsen’s alleged failure to notice the difference (if any) between the CR 2A agreement
    and the White Release an unreasonable mistake under the circumstances? In other words, could
    an attorney exercising “the degree of care, skill, diligence, and knowledge commonly possessed
    and exercised by a reasonable, careful, and prudent lawyer in the practice of law” in Washington
    make such a mistake? Hizey, 
    119 Wn.2d at 261
    .
    -   14-
    No. 76536-1-1/15
    were no unresolved disputes between him and Sutherland and Zvirzdys, that
    Butler told Thomsen that he had independent counsel, and that Thomsen’s
    engagement letter limited the scope of the engagement to the claims asserted in
    the White litigation.
    Although Butler presented his own expert witness testimony countering
    that of Thomsen’s expert, he asserts that such testimony was unnecessary in this
    case because the breach was of the type within the common knowledge of
    laypersons. This is so, Butler contends, because Thomsen’s failure to notice that
    the language of the White Release might release Butler’s claims against
    Sutherland and Zvirzdys is something that laypersons could readily understand.
    However, the question is not merely whether Thomsen made a mistake in
    reviewing the language of the White Release but, rather, whether such a mistake
    is one that no reasonable attorney in Washington would make under the same
    circumstances. See Seer, 137 Wn. App. at 851 (requiring expert witness
    testimony tending to prove that attorney breached duty in the specific
    circumstances where the client failed to disclose information to the attorney).
    The circumstances herein, a joint representation in a complex business litigation
    matter, can hardly be considered within the common knowledge of laypersons.
    Expert opinion evidence on these complex legal circumstances is both
    appropriate and necessary. See Geer, 137 Wn. App. at 851-52.
    Thomsen and Butler presented conflicting expert opinion evidence on the
    issue of Thomsen’s breach of the standard of care. Thus, we conclude that the
    trial court erred when it granted summary judgment to Butler on that issue.
    -15-
    No. 76536-1-1/16
    Iv
    Next, Butler contends that the trial court should have granted summary
    judgment against Thomsen precluding Thomsen from arguing the affirmative
    defense of third party fault. In response, Thomsen asserts that he met his
    burden by offering evidence sufficient to show a genuine question of material fact
    regarding each element of a legal professional negligence claim against Bianchi,
    Butler’s attorney in the Butler litigation.
    The defense of third party fault is an affirmative defense. See Wuth v.
    Lab. Corp. of Am., 189Wn. App. 660, 701-02, 
    359 P.3d 841
     (2015). The party
    asserting an affirmative defense bears the burden of proving the elements of the
    defense. Fulle v. Boulevard Excavating, Inc., 
    20 Wn. App. 741
    , 743, 
    582 P.2d 566
     (1978). For a third party fault defense, the party asserting third party fault
    must present evidence of the third party’s negligence constituting fault. See ~g,
    Adcox v. Children’s Ortho. Hosp & Med. Ctr., 
    123 Wn.2d 15
    , 25-26, 
    864 P.2d 921
    (1993). Thus, because Thomsen asserts that Bianchi’s malpractice, or
    professional negligence, was responsible for any harm to Butler in the Butler
    litigation, to survive summary judgment Thomsen must show that there is a
    question of material fact regarding each element of a malpractice claim against
    Bianchi.
    Thomsen contends that he met his burden to offer evidence sufficient to
    create a question of material fact regarding each element of his third party fault
    defense through Thomsen’s declaration, his expert witness’s declaration, and the
    underlying testimony from the Butler proceedings upon which his expert based
    -16-
    No. 76536-1-1/17
    his opinions. Butler does not assert that such evidence fails to meet Thomsen’s
    burden but, rather, asserts that some of the evidence from Thomsen’s expert
    witness is inadmissible. Specifically, Butler avers that Thomsen’s expert’s
    opinions regarding Bianchi’s choice of forum13 are inadmissible and that,
    therefore, Thomsen failed to meet his burden of proof on the issue of causation.
    Thus, Butler asserts that Thomsen failed to meet his burden to show that
    Bianchi’s actions were the proximate cause of the harm to Butler.14
    Butler first contends that Thomsen’s expert witness’s opinions regarding
    Bianchi’s choice of forum are inadmissible because such a consideration is
    impermissibly speculative. Washington courts’ standard “trial within a trial”
    method of determining cause in fact in a legal malpractice action supports
    Butler’s argument because it necessarily presumes that different fact finders
    would reach the same conclusion when presented with the same evidence and
    law. See Brustv. Newton, 7OWn. App. 286, 293, 
    852 P.2d 1092
     (1993) (‘[T]he
    purpose of the ‘trial within a trial’ that occurs in a legal malpractice action is not to
    recreate what a particular judge or fact finder would have done. Rather, the
    jury’s task is to determine what a reasonable judge or fact finder would have
    done.”); See also Daugert v. Pappas, 
    104 Wn.2d 254
    , 257, 
    704 P.2d 600
     (1985)
    (“[W]hen an attorney makes an error during a trial, the causation issue in the
    13 Thomsen asserts that Bianchi erred by not insisting that the dispute in Butler be
    submitted to arbitration before the White case mediator, as allowed in the White Release.
    Thomsen’s theory is that such an arbitration would have advantaged Butler because the
    mediator/arbitrator had personal knowledge of the White settlement and of the parties’ intentions
    in entering into the settlement.
    14 Indeed, Butler does not dispute Thomsen’s expert’s opinion regarding whether Bianchi
    breached the standard of care. The only dispute is whether Bianchi’s alleged malpractice
    proximately caused Butler’s alleged damages.
    -   17-
    No. 76536-1-1/18
    subsequent malpractice action is relatively straightforward. The trial court
    hearing the malpractice claim merely retries, or tries for the first time, the client’s
    cause of action which the client asserts was lost or compromised by the
    attorney’s negligence.”). Furthermore, as noted by courts in other jurisdictions,
    permitting legal malpractice claims to proceed upon the ground that the attorney
    should have sought a different venue is to allow claims that are entirely
    speculative. See~g~, Mitchell v. Transamerica Ins. Co., 
    551 S.W.2d 586
    , 588
    (1977) (“Trying to predict what a jury might do at any given time or place is
    hazardous and is one of the vagaries of life.”).
    Thomsen asserts that the aforementioned policy concerns are addressed
    herein because arbitration has different evidentiary rules than does superior court
    and because the arbitration agreement specifies that the mediator who helped
    negotiate the agreement would act as the arbitrator.15 We disagree with
    Thomsen that these reasons are sufficient to overcome the policy concern that
    testimony, even expert testimony, regarding what a decision-maker might or
    might not have decided, is speculative. It cannot matter that the decision-maker
    in arbitration may have had greater background knowledge of the White litigation
    or that the rules of evidence are different in arbitration. Even if true, testimony
    regarding what could have been the outcome in such a forum remains
    speculative. The ‘trial within a trial” mechanism is the proper method by which to
    determine what may or may not have happened in prior litigation but for the
    1~ The White Release actually specifies that the mediator “or a single arbitrator as agreed
    by the Parties” will arbitrate. It does not state that the parties would necessarily use the services
    of the mediator.
    -18-
    No. 76536-1-1/19
    alleged malpractice. Brust, 
    70 Wn. App. at 293
    . Thus, we hold that speculative
    expert testimony regarding what may have or not have happened in a different
    forum is inadmissible.
    We further hold that Thomsen’s expert may not present opinion evidence
    regarding whether the Butler court would have ruled differently but for Bianchi’s
    tactical decisions. The proper method for determining what a trier of fact would
    have determined absent Bianchi’s alleged mistakes is to present the case to the
    jury free of such mistakes. See Brust, 
    70 Wn. App. at 293
    . For example,
    Thomsen may present evidence to the jury that Bianchi did not present extrinsic
    evidence of the intent of the White Release’s language in Butler and then may
    present said extrinsic evidence. However, Thomsen is not permitted to present
    speculative expert testimony that Bianchi’s failure to present such extrinsic
    evidence and argue for its admissibility under Berg caused the Butler court’s
    rulings regarding the correct interpretation of the White Release. That is for the
    jury to decide.
    Although we hold that Thomsen’s speculative expert opinion evidence as
    to hypothetical results is inadmissible, the underlying evidence upon which said
    expert opinion evidence is based shows that there is a genuine dispute of
    material fact on the issue of causation. Butler’s reply to Sutherland’s and
    Zvirzdys’s response to Butler’s motion for summary judgment in the Butler
    litigation did not in any way refer to Berg and the rules it set forth regarding the
    -19-
    No. 76536-1-1/20
    admissibility of extrinsic evidence.16 Whether such failure resulted in the Butler
    court’s ruling—in other words, whether the extrinsic evidence not considered by
    the Butler court would establish that the White Release did not release claims
    amongst Butler, Sutherland, and Zvirzdys—is a disputed factual question. ~
    Berg, 
    115 Wn.2d at 668
     (“A question of interpretation of an integrated agreement
    is to be determined by the trier of fact if it depends on the credibility of extrinsic
    evidence or on a choice among reasonable inferences to be drawn from extrinsic
    evidence.” (quoting      RESTATEMENT (SECOND) OF CONTRACTS                 § 212(2))). We
    conclude that there is a genuine dispute over a question of material fact
    regarding whether Bianchi’s alleged malpractice proximately caused Butler’s
    alleged damages. The trial court properly denied summary judgment on this
    issue.
    Reversed and remanded for proceedings consistent with this opinion.
    “4
    We concur:                                                             /
    16 Butler asserts that the extrinsc evidence Thomsen contends should have been
    introduced is inadmissib e under ~jg and subsequent cases applying the ~g rules But er
    appears to argue that the ev dence is inadmissble simply because it contradicts hs and the
    Butler court’s interpretations of the White Release. While Butler lists several princip es that courts
    consider when interpreting contract language (that he asserts show extrinsic evidence shou d not
    be admissible when contract language is clear), he fails to acknowledge that the fl~jg court he d
    both that extrinsic evidence is admissible even in situations in which the contract language s not
    ambiguous and that ‘the various principles of [contracti interpretaton should not be app ed as
    absolutes.” 
    115 Wn.2d at 664, 669
    .
    -   20   -