Cornell law professor Sherry F. Colb discusses the concept of “conditional irrelevance”—which she first identified in a law review article in 2001—and explains why the concept is useful for understanding the arguments before the U.S. Supreme Court in Kansas v. Glover. Through the lens of conditional irrelevance, Colb explains why the knowledge of one fact (that the owner of the vehicle in that case lacked a valid license) should not itself provide police reasonable suspicion to stop the vehicle.

Cornell law professor Sherry F. Colb responds to a colleague’s claim (yet unconfirmed) that jurors have an easier time distinguishing truth from falsehood when they read a transcript of testimony than when they listen to and watch the testimony directly. Assuming the claim is true, Colb describes why that claim might at first be surprising and also why, on further consideration, it makes sense. She proposes that if the claim is true, we ought perhaps to consider whether the distractors inherent in live testimony should excludable under the Federal Rules of Evidence.

Cornell University law professor Sherry Colb discusses the role of Pennsylvania Rule of Evidence 404 in the criminal trial against Bill Cosby. Colb argues that the rule against character evidence serves a specific purpose in “whodunit” cases (where the perpetrator is unknown) but that it may serve a different purpose in “what was done” cases, such as the present case against Cosby.