Opinion vs. legal conclusion: Has your expert crossed the line?
Abstract: The line between permissible expert opinion and impermissible legal or factual conclusions can sometimes be blurry under the Federal Rules of Evidence. It’s critical for lawyers and their expert witnesses to understand the distinction between an opinion that embraces an ultimate issue and one that offers a legal conclusion. This article provides examples that help clarify the rules. In re Columbia Pipeline Group, Inc. Merger Litigation, Cons. C.A. No. 2018-0484-JTL (Del. Ch. July 14, 2022).