The 2023 amendment to Rule 702 clarified that the proponent must establish admissibility requirements by a preponderance.

An analytical gap is a disconnect between the data an expert relies on and the conclusion drawn from it.

Cumulative expert testimony is duplicative opinion from multiple experts on the same subject, subject to exclusion.

A Daubert hearing is an evidentiary proceeding at which the court evaluates the admissibility of expert testimony.

A Daubert motion asks the court to exclude an opposing expert's testimony as unqualified, unreliable, or unhelpful to the factfinder.

The Daubert standard requires trial judges to act as gatekeepers, admitting expert testimony only if it rests on reliable principles reliably applied to...

The fit requirement demands that expert testimony be sufficiently tied to the case facts to assist the trier of fact.

The Frye standard admits expert testimony only if the underlying methodology is generally accepted in the relevant scientific community.

The gatekeeping function is the trial court's obligation to ensure expert testimony is both relevant and reliable before admission.

Ipse dixit describes an expert opinion resting on the expert's assertion rather than on identifiable reasoning.

The net opinion rule excludes expert testimony offering conclusions without the factual and reasoning basis supporting them.

Reliable methodology is the requirement that expert opinion rest on sound principles and methods properly applied.

Rule 702 is the federal rule governing expert testimony, requiring that opinions rest on sufficient facts, reliable methods, and a reliable application of...