In re Ripple Labs Inc. Litigation

District Court, N.D. California·Decided October 24, 2024·No. 4:18-cv-06753·Unknown

Opinion

1 2 UNITED STATES DISTRICT COURT 3 NORTHERN DISTRICT OF CALIFORNIA

5 In re RIPPLE LABS, INC. LITIGATION 6 Case No. 18-cv-06753-PJH

7 This Document Relates To: ORDER RE DAUBERT MOTIONS 8 All Actions Re: Dkt. 318, 323, 327, 328 9

11 12 Before the court are four motions filed by the parties in the above-captioned case: 13 (1) defendants’ motion to exclude the testimony of plaintiff’s expert Jeremy Clark (Dkt. 14 327), (2) defendants’ motion to exclude the testimony of plaintiff’s expert Saifedean 15 Ammous (Dkt. 328), (3) plaintiff’s motion to exclude the testimony of defendants’ expert 16 Alan Schwartz (Dkt. 318), and (4) defendants’ motion to exclude the testimony of 17 plaintiff’s expert Joel Seligman (Dkt. 323). Having read the papers filed by the parties 18 and carefully considered their arguments and relevant authority, and good cause 19 appearing, the court hereby rules as follows. 20 BACKGROUND 21 In this securities case, defendants filed a motion for summary judgment, which the 22 court granted in part and denied in part. See Dkt. 419. In the summary judgment order, 23 the court noted that the parties had filed six motions to exclude expert testimony under 24 Daubert, and that two of the motions related to classwide damages issues that were 25 rendered moot by the court’s dismissal of class claims. See id. at 16-17. The court 26 directed the parties to file a notice indicating whether they continued to pursue the four 27 remaining motions. See id. The parties then filed a notice stating that they did indeed 1 DISCUSSION 2 I. Legal Standard 3 A witness who has been qualified as an expert by knowledge, skill, experience, 4 training, or education may give an opinion on scientific, technical, or otherwise 5 specialized topics if (1) the expert's scientific, technical, or other special knowledge will 6 help the trier of fact understand the evidence or determine a fact in issue, (2) the 7 testimony is based upon sufficient facts or data, (3) the testimony is the product of 8 reliable principles and methods, and (4) the witness has applied the principles and 9 methods reliably to the facts of the case.” Fed. R. Evid. 702; see also Daubert v. Merrell 10 Dow Pharms., Inc., 509 U.S. 579 (1993). 11 The proponent of expert testimony bears the burden of establishing by a 12 preponderance of the evidence that the admissibility requirements are met. See Fed. R. 13 Evid. 702, Advisory Committee Notes. Although there is a presumption of admissibility, 14 the trial court is obliged to act as a “gatekeeper” with regard to the admission of expert 15 scientific testimony under Rule 702. See Daubert, 509 U.S. at 588, 597; see also Kumho 16 Tire Co., Ltd. v. Carmichael, 526 U.S. 137, 147 (1999). 17 Thus, Daubert requires a two-part analysis. First, the court must determine 18 whether an expert’s testimony reflects “scientific knowledge,” whether the findings are 19 “derived by the scientific method,” and whether the work product is “good science”—that 20 is, whether the testimony is reliable and trustworthy. Daubert, 509 U.S. at 590 & n. 9, 21 593. Second, the court must determine whether the testimony is “relevant to the task at 22 hand.” Id. at 597. 23 Scientific evidence is reliable if it is based on an assertion that is grounded in 24 methods of science – the focus is on principles and methodology, not on conclusions. 25 Metabolife Int’l, Inc. v. Wornick, 264 F.3d 832, 841 (9th Cir. 2001). In determining 26 whether an expert’s reasoning or methodology is scientifically valid, the district court can 27 consider “many factors,” including (1) whether a scientific theory or technique can be 1 review and publication; (3) the known or potential rate of error and the existence and 2 maintenance of standards controlling the techniques operation; and (4) whether the 3 technique is generally accepted. Daubert, 509 U.S. at 593–95; Fed. R. Evid. 702, 2000 4 Advisory Committee Notes. 5 Nevertheless, depending on the type of expert testimony offered, these factors 6 may not be appropriate to assess reliability. Kumho Tire, 526 U.S. at 150. Other factors 7 that might be considered include whether an expert has unjustifiably extrapolated from an 8 accepted premise to an unfounded conclusion, or whether an expert has adequately 9 accounted for obvious alternative explanations. See General Elec. Co. v. Joiner, 522 10 U.S. 136, 146 (1997); Claar v. Burlington Northern R. Co., 29 F.3d 499, 502 (9th 11 Cir.1994). 12 The trial court should be also mindful that reliability is not determined based on the 13 “correctness of the expert’s conclusions but the soundness of his methodology.” Stilwell 14 v. Smith & Nephew, Inc., 482 F.3d 1187, 1192 (9th Cir. 2007). The trial court should 15 ensure the expert “employs in the courtroom the same level of intellectual rigor that 16 characterizes the practice of an expert in the relevant field.” Kumho Tire, 526 U.S. at 17 152. 18 Rule 702’s second prong concern's relevancy, or “fit.” See Daubert, 509 U.S. at 19 591. Expert opinion testimony is relevant if the knowledge underlying it has a “valid ... 20 connection to the pertinent inquiry,” and it is reliable if the knowledge underlying it “has a 21 reliable basis in the knowledge and experience of [the relevant] discipline.” Id. at 592; 22 Kumho Tire, 526 U.S. at 149. 23 “The trial court has discretion to decide how to test an expert’s reliability as well as 24 whether the testimony is reliable, based on ‘the particular circumstances of the particular 25 case.’” Primiano v. Cook, 598 F.3d 558, 564 (9th Cir. 2010). “Shaky but admissible 26 evidence is to be attacked by cross examination, contrary evidence, and attention to the 27 burden of proof, not exclusion.” Id. at 564. 1 II. Legal Analysis 2 A. Motion to exclude testimony of Clark 3 Defendants argue that Clark’s opinion from his opening report is inadmissible 4 because (1) he applied no methodology, and (2) his opinion lacks relevance. See Dkt. 5 327 at 16-21. Defendants further argue that Clark’s rebuttal opinions are inadmissible 6 and “procedurally improper.” See id. at 21-25. 7 1. Clark’s opening report 8 As to Clark’s opening report, defendants first argue that he used no recognized 9 methodology, and instead did only “background reading” then formed opinions based on 10 his “expertise,” without more. See Dkt. 327 at 15-16. Defendants argue that such “black 11 box” ipse dixit is not permitted under Daubert and Rule 702. See id. at 16. 12 Plaintiff responds by arguing that Clark’s opening report sets forth five 13 conclusions, only two of which appear to be substantively challenged by defendants, 14 even as they purport to seek exclusion of Clark’s entire report. See Dkt. 394 at 10. 15 Specifically, Clark reaches the following conclusions: (1) the XRP ledger consensus 16 protocol requires validators to agree on a list of trusted validators, and using Ripple’s list 17 is a de facto requirement, (2) Ripple is the “root of trust” on the XRP ledger, (3) Ripple is 18 a gatekeeper to full participation in the ledger, (4) XRP distribution favors Ripple, and (5) 19 validators on the XRP ledger require external incentives. See id. Plaintiff argues that 20 defendants focus almost entirely on Clark’s first two conclusions, implicitly conceding the 21 admissibility of the remaining three. See id.

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