Introduction

Expert witnesses can make or break a case. In Texas, courts do not simply accept an expert’s credentials at face value—they must evaluate whether the expert’s testimony is reliable and relevant before it reaches a jury.

This process is governed by Texas Rule of Evidence 702and a line of cases led by E.I. du Pont de Nemours & Co. v. Robinson, which adopted and expanded upon the federal Daubert standard.

If you are litigating in Texas, understanding how to exclude unreliable expert testimony is one of the most powerful procedural tools available.

The Legal Foundation: Texas Rule of Evidence 702

Texas Rule of Evidence 702 provides:

“A witness who is qualified as an expert by knowledge, skill, experience, training, or education may testify… if 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.”
— Tex. R. Evid. 702

This rule imposes two key requirements:

1. Qualification – Is the expert actually qualified?
2. Reliability & Relevance – Is the testimony grounded in sound methodology and helpful to the factfinder?

The Robinson Standard: Texas’ Version of Daubert

In E.I. du Pont de Nemours & Co. v. Robinson, 923 S.W.2d 549 (Tex. 1995), the Texas Supreme Court held that trial courts must act as gatekeepers to exclude unreliable expert testimony.

The Court outlined non-exclusive reliability factors, including:

• Whether the theory can be tested
• Whether it has been peer reviewed
• The rate of error
• Whether the technique is generally accepted
• The non-judicial uses of the theory

This mirrors—but is not identical to—the federal Daubertstandard.

Expanded Framework: Gammill and Beyond

Texas later expanded the doctrine in Gammill v. Jack Williams Chevrolet, Inc., 972 S.W.2d 713 (Tex. 1998), clarifying:

Even non-scientific expert testimony must have a reliable foundation.

This is critical because many Texas cases involve:

• Construction defects
• Business valuation disputes
• Property damage estimates

These often rely on experience-based experts, not purely scientific ones.

Three Core Requirements for Admissibility

Texas courts now analyze expert testimony under three prongs:

1. Qualification

The expert must have expertise directly relevant to the issue—not just general knowledge.

2. Reliability

The testimony must be grounded in a reliable methodology, not speculation.

3. Relevance (“Fit”)

The testimony must actually assist the trier of fact.

Failure on any one of these prongs is grounds for exclusion.

Procedural Vehicle: Motion to Exclude or Strike Expert

To challenge an expert, you typically file a:

• Motion to Exclude Expert Testimony
• Robinson/Daubert Motion
• Often paired with a No-Evidence Summary Judgment (TRCP 166a(i))

This creates a powerful one-two punch:

1. Knock out the expert
2. Argue there is no evidence on a required element

Timing Matters: Don’t Waive the Challenge

Texas courts require that challenges to expert testimony be made before trial or when the evidence is offered.

Failing to timely object can waive the issue on appeal.

Additionally:

• Pretrial hearings are often called “Robinson hearings”
• Courts may rule based on briefing alone or conduct live testimony

Common Grounds for Excluding Experts

In practice, Texas courts frequently exclude experts for:

• Analytical gaps (conclusions not supported by data)
• Ipse dixit opinions (“because I said so” reasoning)
• Improper assumptions
• Failure to follow industry standards
• Unreliable damage models

A key Texas principle:

An expert’s opinion is only as good as the facts and methodology underlying it

Strategic Use in Texas Litigation

For practitioners, expert challenges are not just evidentiary—they are case-dispositive tools.

Used correctly, they can:

• Collapse the opposing party’s claims
• Force early settlement
• Strengthen summary judgment posture
• Preserve appellate error

This is especially important in:

• Construction disputes
• Commercial litigation
• Real estate valuation cases
• Family law property disputes involving experts

Practical Insight: Texas Judges Take This Seriously

Texas trial courts are increasingly strict about expert reliability.

The Texas Supreme Court has repeatedly emphasized:

Trial courts must not abdicate their gatekeeping role

This means weak expert testimony is more vulnerable than ever—especially in complex civil litigation.

Conclusion

Challenging expert testimony in Texas is one of the most technical—and powerful—litigation tools available.

Under Tex. R. Evid. 702 and the Robinson line of cases, courts are required to exclude unreliable or irrelevant expert opinions before they ever reach a jury.

For litigants and attorneys alike, understanding this framework is essential—not just for defending cases, but for winning them outright.

At David C. Barsalou, Attorney at Law, PLLC, we help clients navigate business, family, tax, estate planning, and real estate matters ranging from document drafting to litigation with clarity and confidence. If you’d like guidance on your situation, schedule a consultation today. Call us at (713) 397-4678, email barsalou.law@gmail.com, or reach us through our Contact Page. We’re here to help you take the next step.