Vol. 125 No. 2 Argument from the “anticanon,” the set of cases whose central propositions all legitimate decisions must refute, has become a persistent but curious feature of American constitutional law. These cases, Dred Scott v. Sandford, Plessy v. Ferguson, Lochner v. New York, and Korematsu v. United States, are consistently cited in Supreme Court opinions, in constitutional law casebooks, and at confirmation hearings as prime examples of weak constitutional analysis. Upon reflection, however, anticanonical cases do not involve unusually bad reasoning, nor are they uniquely morally repugnant. Rather, these cases are held out as examples for reasons external to conventional constitutional argument. This Article substantiates that claim and explores those reasons.