U.S. Supreme Court justices engaged in a discussion Wednesday on the hot-button issue of when and whether the court’s precedents should be overturned—a question that figured in Justice Brett Kavanaugh’s confirmation hearing last year.

The colloquy came as the court heard arguments in Franchise Tax Board of California v. Hyatt, one of three cases so far this term in which litigants are asking the justices to overturn precedents of varying strength and vintage.