Conventional wisdom holds that the American people are woefully ignorant about law and courts. In light of this putative ignorance, scholars and other commentators have questioned whether the public should play a role in the judicial process—for example, whether public preferences should matter for U.S. Supreme Court confirmation processes. Unfortunately, however, much of what we know—or think we know— about public knowledge of the Supreme Court is based upon flawed measures and procedures. So, for instance, the American National Election Study, a prominent source of the conclusion that people know little if anything about the U.S. Supreme Court, codes as incorrect the reply that William Rehnquist is (was) a justice on the U.S. Supreme Court; respondents, to be judged knowledgeable, must identify Rehnquist as the Chief Justice of the U.S. Supreme Court (which, of course, technically, he was not). More generally, the use of open-ended recall questions leads to a serious and substantial underestimation of the extent to which ordinary people know about the nation's highest court. Our purpose in this paper is to revisit the question of how knowledgeable the American people are about the Supreme Court. Based on two national surveys— using more appropriate, closed-ended questions—we demonstrate that levels of knowledge about the Court and its justices are far higher than nearly all earlier surveys have documented. And, based on an experiment embedded in one of the national surveys, we also show the dramatic effect of question-form on estimates of levels of knowledge. Finally, we draw out the implications of political knowledge for the degree to which people support the U.S. Supreme Court. Our findings indicate that greater knowledge of the Court is associated with stronger loyalty toward the institution. We conclude by reconnecting these findings to “positivity theory,” which asserts that paying attention to courts not only provides citizens information, but also exposes them to powerful symbols of judicial legitimacy.