Binding-Precedent Conflict as a “Substantial Ground for Difference of Opinion” Under Texas’s Permissive-Appeal Statute

1. Introduction

This per curiam opinion addresses a recurring gatekeeping problem in Texas interlocutory practice: when a trial court permits a permissive interlocutory appeal under TEX. CIV. PRAC. & REM. CODE § 51.014(d), what qualifies as “a controlling question of law as to which there is a substantial ground for difference of opinion”?

The underlying lawsuit is a toxic-tort-style crop-damage dispute. Respondent farmers allege Helena Chemical Company harmed their crops via aerial herbicide application to a neighboring property. Helena contends the farmers rely on the same (or materially indistinguishable) expert proof that the Supreme Court of Texas previously rejected in Helena Chemical Co. v. Cox, 664 S.W.3d 66 (Tex. 2023).

After the trial court denied Helena’s no-evidence summary judgment (and did not rule on a motion to strike experts), it nevertheless certified a permissive appeal asking whether Cox “dictate[s]” that the farmers’ expert testimony is unreliable and thus “no evidence of causation.” The El Paso Court of Appeals declined the appeal, reasoning that if Cox truly controls, the law is “settled” and therefore there is no “substantial ground for difference of opinion.”

The Supreme Court of Texas reversed that understanding of § 51.014(d)(1) and announced a practical rule: a substantial ground for difference of opinion exists when there is a substantial ground to conclude the trial court’s ruling is at odds with binding precedent.

2. Summary of the Opinion

The Court holds that § 51.014(d)(1) is satisfied “when there is a substantial ground for concluding that a trial-court ruling is at odds with binding precedent.” In other words, a perceived conflict between a trial court’s ruling and governing appellate precedent is itself a “difference of opinion” substantial enough to justify permissive interlocutory review—particularly when the question is controlling and early correction may end the case.

Applying that rule, the Court concluded the court of appeals should have accepted the permissive appeal. Without merits briefing or argument, the Supreme Court granted review and directed the court of appeals to accept the appeal under § 51.014(h).

3. Analysis

A. Precedents Cited

• Helena Chemical Co. v. Cox, 664 S.W.3d 66 (Tex. 2023)
  Cox is the substantive causation/expert-evidence anchor for the certified question. There, the Court held expert proof was “no evidence of causation” because it failed to “account for plausible alternative causes” and offered “no reliable way to extrapolate” from limited lab tests to “vast and scattered acreage.” In this 2026 opinion, Cox functions less as a merits holding than as the purportedly binding precedent that created the asserted conflict: Helena argued the same experts (via a Rule 11 agreement referenced in Cox) should fail again, while the trial court’s denial of summary judgment suggested otherwise.
• Mitschke v. Borromeo, 645 S.W.3d 251 (Tex. 2022)
  Cited for the foundational hierarchy principle: “lower courts must follow the precedents of all higher courts.” The Court uses this to explain why trial courts rarely announce open disagreement with Texas Supreme Court precedent—making the act of certifying a permissive appeal (despite denying relief) a meaningful signal that the trial court perceives tension with binding authority.
• Indus. Specialists, LLC v. Blanchard Refin. Co., 652 S.W.3d 11 (Tex. 2022)
  Cited to situate permissive interlocutory appeals within Texas’s broader “final judgment rule” and its statutory exceptions. This frames § 51.014(d) as one legislative mechanism for early appellate correction when doing so can efficiently shape or terminate litigation.
• Sabre Travel Int'l, Ltd. v. Deutsche Lufthansa AG, 567 S.W.3d 725 (Tex. 2019)
  Sabre supplies two key points: (1) the distinction between interlocutory appeals “as of right” (§ 51.014(a)) and permissive appeals (§ 51.014(d)); and (2) the policy rationale for permissive appeals—“early, efficient resolution of determinative legal issues.” The Court relies on Sabre to reject any notion that § 51.014(d) is reserved for academically “well-developed” issues; instead, it is an efficiency tool aimed at determinative legal questions.
• VCC v. Allied World Specialty Ins. Co., No. 01-24-00599-CV, 2025 WL 1225117 (Tex. App.—Houston [1st Dist.] Apr. 28, 2025, pet. filed)
  Cited in a footnote as an illustration that trial courts sometimes expressly indicate discomfort with controlling precedent (“I don't like that controlling legal precedent”). The Court uses this to underscore that explicit disagreement is not required; the statutory mechanism should still function when the trial court implicitly recognizes possible inconsistency.

B. Legal Reasoning

The Court’s reasoning turns on how to interpret the phrase “a substantial ground for difference of opinion” in § 51.014(d)(1). The court of appeals treated “difference of opinion” as something like uncertainty in the law itself—novelty, lack of authority, or doctrinal doubt—concluding that if binding precedent answers the question, there can be no qualifying difference of opinion.

Key moves in the Court’s interpretive approach:

• Baseline = the trial court’s legal answer as a fair-minded jurist.
  The Court says the trial court’s answer “should be treated as the product of a fair-minded jurist and used as the baseline” for assessing whether a “substantial ground” exists.
• Conflict with binding precedent is inherently “substantial.”
  Where “the trial court comes to a conclusion it believes might be wrong under our precedent,” there is “a substantial ground” for concluding it is “at odds with binding precedent.”
• Section 51.014(d) is not a “moot-court competition.”
  The Court rejects a requirement that the certified issue be extensively reasoned or novel; the statute is a pragmatic vehicle for early resolution of determinative legal questions.
• Prong (d)(2) reinforces the efficiency rationale.
  If a perceived conflict with precedent concerns an issue that “would end the litigation,” immediate review “may materially advance the ultimate termination of the litigation.”

On that understanding, the Court concluded the court of appeals should not have asked whether expert-admissibility standards are “settled” in the abstract; it should have credited the trial court’s certification as evidence of a meaningful legal disagreement and accepted the appeal.

C. Impact

This opinion materially recalibrates permissive interlocutory practice in Texas in three ways:

• Expands the practical availability of § 51.014(d) review when precedent is allegedly misapplied.
  Parties can argue that a trial court’s ruling conflicts with binding precedent and that this conflict itself satisfies the “substantial ground for difference of opinion” requirement, even if the governing law is otherwise “settled.”
• Constrains courts of appeals from denying permissive appeals solely because the law is settled.
  The decision signals that “settled law” is not a categorical reason to refuse a permissive appeal when the trial court’s ruling appears inconsistent with that settled law.
• Promotes early error-correction on case-dispositive legal questions.
  Especially in expert-evidence and summary-judgment contexts (often outcome-determinative and costly), the ruling encourages earlier appellate intervention where a trial court signals potential conflict with controlling authority.

Important limitation: the Court did not decide whether Cox actually controls the merits here, nor whether the experts are unreliable. The holding is procedural—about when a permissive appeal should be accepted—while leaving the substantive expert-evidence dispute for the court of appeals to address on the accepted interlocutory appeal.

4. Complex Concepts Simplified

• Interlocutory appeal: An appeal taken before the case ends in a final judgment. Texas generally prefers waiting until final judgment, but statutes create exceptions.
• Permissive interlocutory appeal (§ 51.014(d)): A two-step discretionary pathway: the trial court must permit it (meeting statutory criteria), and the court of appeals may still choose whether to accept it.
• “Controlling question of law”: A legal issue whose resolution materially affects the case’s outcome (often meaning it could dispose of claims or defenses).
• “Substantial ground for difference of opinion” (as clarified here): Not limited to unsettled or novel law. It exists when there is a substantial basis to think the trial court’s ruling conflicts with binding precedent—i.e., reasonable “daylight” between what the trial court did and what precedent appears to require.
• “Binding precedent”: Prior decisions that lower courts must follow (e.g., Texas Supreme Court decisions binding on Texas trial courts and courts of appeals).
• No-evidence summary judgment: A procedural device arguing that the opponent has no evidence of one or more essential elements; if granted, it ends those claims without trial.

5. Conclusion

The Supreme Court of Texas establishes a clear, pragmatic rule for permissive interlocutory appeals: § 51.014(d)(1) is satisfied when there is a substantial ground to conclude the trial court’s ruling is at odds with binding precedent. By directing the court of appeals to accept the appeal, the Court reinforces § 51.014(d)’s function as an efficiency mechanism—designed to resolve determinative legal issues early—rather than a narrow pathway limited to novel or doctrinally uncertain questions.