Cornell University law professor Sherry Colb comments on a recent decision by the U.S. Supreme Court invalidating Florida’s approach to identifying criminal convicts who are intellectually disabled and therefore constitutionally ineligible for the death penalty. Colb describes the facts and issues that brought the case before the Court and infers from the opinion that the Court may have a growing consciousness about those sentenced to death. Acknowledging also the strong arguments presented by the dissent, Colb concludes that essential difference between the majority and the dissent is a disagreement as to what is worse: to execute the wrong person to spare the wrong person from execution.