When you receive an expert opinion, one of the first things you are considering is whether it is worth filing a Daubert motion / challenge. A Daubert motion is a generally a pretrial motion you are using to challenge the admissibility of the expert opinion. Keep in mind this deals with the admissibility, not the credibility, of the expert opinion. A Daubert motion is based on three prongs that must be answered: 1) is the witness qualified to render the expert opinion?; 2) is the expert’s opinion reliable?; and 3) is the expert’s opinion relevant?.

A Daubert motion is premised after Federal Rule of Evidence 702 that provides:

A witness who is qualified as an expert by knowledge, skill, experience, training, or education may testify in the form of an opinion or otherwise if:

1. 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;
2. the testimony is based on sufficient facts or data;
3. the testimony is the product of reliable principles and methods; and
4. the expert has reliably applied the principles and methods to the facts of the case.