Rule 701. Opinion testimony by lay witnesses.
If the witness is not testifying as an expert, the witness' testimony in the form of opinions or inferences is limited to those opinions or inferences which are (a) rationally based on the perception of the witness and (b) helpful to a clear understanding of the witness' testimony or the determination of a fact in issue.
History: Ad. Sup. Ct. Ord. 12729, Dec. 29, 1976, eff. July 1, 1977; amd. Sup. Ct. Ord. June 7, 1990, eff. June 7, 1990.
Structure Montana Code Annotated
Chapter 10. Montana Rules of Evidence
Part Article VII. Opinions and Expert Testimony
Rule 701. Opinion testimony by lay witnesses
Rule 702. Testimony by experts
Rule 703. Basis of opinion testimony by experts
Rule 704. Opinions on ultimate issue
Rule 705. Disclosure of facts or data underlying expert opinion