X Social Media, LLC v. X Corp.

District Court, M.D. Florida·Decided September 5, 2025·No. 6:23-cv-01903·Unknown

Opinion

UNITED STATES DISTRICT COURT MIDDLE DISTRICT OF FLORIDA ORLANDO DIVISION X SOCIAL MEDIA LLC, Plaintiff, v. Case No. 6:23-cv-1903-JA-NWH X CORP., Defendant.

ORDER □ This case is before the Court on the parties’ Daubert! motions (Docs. 82 & 882), their responses in opposition (Docs. 99 & 104), and their replies (Docs. 121 & 123).8 Based on the Court’s review of the parties’ submissions, Plaintiff's motion must be denied and Defendant’s motion must be granted. I. BACKGROUND This trademark action involves alleged reverse confusion of Plaintiffs senior, but less widely known, X SOCIALMEDIA mark with Defendant’s junior,

1 Daubert v. Merrell Dow Pharms., Inc., 509 U.S. 579 (1993). 2 Defendant filed an initial Dawbert motion (Doc. 84) and then filed a corrected motion (Doc. 88) to include a certificate of conferral pursuant to Local Rule 3.01(g). The Court refers only to Defendant’s corrected Daubert motion (Doc. 88) and will deny the initial motion (Doc. 84) as moot. 3 The Court permitted the parties to file reply briefs in support of their Dawbert motions. (See orders, Docs. 108 & 110).

but more widely recognized, “X” mark. Plaintiff operates an advertising agency that designs and runs social-media advertising campaigns for mass-tort and class-action law firms. (Doc. 82 at 6). Plaintiff owns a federal trademark registration for the mark X SOCIALMEDIA, which Plaintiff began using in 2015.4 (Doc. 85-14 at 2; Doc. 85-35 at 2; Doc. 85-52 at 2; Doc. 104 at 5). Defendant operates X—formerly known as Twitter—an online and app-based social-media platform that allows users to create and share a wide range of digital content, including advertisements. (Doc. 85-1 at 19:21—24; Doc. 85-6 at 58:8-14; Doc. 85- 11 at 10; Doc. 85-19). Following an acquisition in 2022, Defendant rebranded | the platform as “X,” a change attributed to its chief technology officer’s longstanding sentimental attachment to the letter “X.” (Doc. 85-1 at 70:10—24). In August 2023, Defendant received a cease-and-desist letter from Plaintiff objecting to Defendant’s use of the “X” mark. (Doc. 85-1 at 42:3—7; Doc. 85-11 at 21-22). Plaintiff then filed this action under the Lanham Act, 15 U.S.C. §§ 1114, 1125, alleging that Defendant’s 2023 rebrand is likely to cause reverse confusion—that is, to lead consumers to believe Plaintiff is affiliated with or sponsored by Defendant—and that consumers will forgo engaging Plaintiff's services as a result. (See generally Doc. 1 at 9-11; Doc. 82 at 2, 6; Doc. 104 at 2—

4U.S. Trademark Registration No. 5,554,203 (Sept. 4, 2018). (Doc. 85-71 at C- 7).

3). Plaintiff also asserts claims under Florida law for unfair competition and trademark and service mark infringement.' (Doc. 1 at 11-14). Both parties retained experts to advance their respective theories of the

case. (See Docs. 85-71, 85-72, & 85-73). Defendant offers (1) marketing scholar Peter Golder and (2) survey practitioner Hal Poret. (Doc. 85-71 at 2—3; Doc. 85- 72 at 2-3). Professor Golder analyzes the product markets in which the parties operate and opines that reverse confusion is improbable. (Doc. 85-71 at 5-9, 41— 42). Mr. Poret conducted an Eveready* consumer-perception survey to test for the likelihood of reverse confusion and found minimal confusion. (Doc. 85-72 at 5-7, 61). Plaintiff offers Professor David J. Franklyn, a trademark-law scholar, to rebut both Professor Golder and Mr. Poret. (Doc. 85-73 at 1-3). Professor Franklyn disputes Professor Golder’s market-structure analysis and critiques My. Poret for limiting his survey universe to representatives of law firms and advertising agencies, contending that Mr. Poret should also have surveyed the

consumers who view Plaintiffs ads on social media. (Doc. 85-73 at 10-11, 29— 30). Both parties move to exclude aspects of the opposing experts’ opinions under Daubert and Federal Rule of Evidence 702. (Doc. 82 at 1; Doc. 88 at 1).

5 The Court previously dismissed Plaintiffs claim under the Florida Deceptive and Unfair Trade Practices Act. (See Doc. 41 at 7-9). 6 The “Eveready” survey is named after the survey endorsed by the Seventh Circuit in Union Carbide v. Ever-Ready, Inc., 531 F.2d 366, 385 (7th Cir. 1976).

II. LEGAL STANDARDS Federal Rule of Evidence 702 governs the admissibility of expert opinions and “compels” the Court “to perform [a] critical ‘gatekeeping’ function.” United States v. Frazier, 387 F.8d 1244, 1260 (11th Cir. 2004) (en banc) (quoting Daubert, 509 U.S. at 589 n.7). This gatekeeping obligation “applies to all expert testimony,” not just “scientific” evidence. Kumho Tire Co. v. Carmichael, 526 U.S. 187, 147 (1999). Under Rule 702, a qualified expert may testify if: (a) the expert’s scientific, technical, or other specialized knowledge will help the trier of fact to understand the evidence or to determine a fact in issue; (b) the testimony is based on sufficient facts or data; (c) the testimony is the product of reliable principles and methods; and (d) the expert’s opinion reflects a reliable application of the principles and methods to the facts of the case. Fed. R. Evid. 702. “The party offering the expert has the burden of satisfying each of these . . . elements by a preponderance of the evidence.” Rink v. Cheminova, Inc., 400 F.3d 1286, 1292 (11th Cir. 2005) (citing Allison v. McGhan Med. Corp., 184 F.3d 1300, 13806 (11th Cir. 1999)). Because this is a bench trial, (see Doc. 36), the traditional Dawbert analysis may be somewhat “relaxed” because “[t]here is less need for the gatekeeper to keep the gate when the gatekeeper is keeping the gate only for himself.” United States v. Brown, 415 F.8d 1257, 1269 (11th Cir. 2005). Nevertheless, Rule 702 still requires district courts to exclude unreliable or unhelpful expert testimony, even in a bench trial. See Ass Armor, LLC v. Under

Armour, Inc., No. 15-CV-20853-CIV, 2016 WL 7156092, at *4 (S.D. Fla. Dec. 8, 2016). Ill. DISCUSSION The Court discusses the challenged opinions of Professor Golder, Mr. Poret, and Professor Franklyn in turn. A. Professor Peter Golder Defendant retained Professor Golder to analyze the structure of the parties’ product markets, the sophistication of Plaintiff's consumers, and the nature of Plaintiff's sales process and to “[d]iscuss whether [these] assessments” □ are “consistent or inconsistent with Plaintiffs theory of reverse confusion.” (Doc. 85-71 at 6). Plaintiff moves to exclude Professor Golder under Rules 702 and 403, contending that he is unqualified, offers improper legal conclusions, ignores the Eleventh Circuit pattern jury instructions for trademark-infringement cases, disregards evidence of actual confusion, relies on irrelevant third-party marks, and “cherry-pick[s]” facts. (Doc. 82 at 5-6, 8, 12, 15). 1. Summary of Professor Golder’s Opinions Professor Golder opines that similar brand names can coexist without

consumer confusion when they operate in distinct ‘product categories,’ which he illustrates with third-party examples such as “Delta”’—the brand-name of an airline, a faucet company, and a dental insurer. (Doc. 85-71 at 7, 11, 15). He opines that Plaintiff and Defendant “operate in different product categories”

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