Hugh H. Benson explores Plato's answer to Clitophon's challenge, the question of how one can acquire the knowledge Socrates argues is essential to human flourishing-knowledge we all seem to lack. Plato suggests two methods by which this knowledge may be gained: the first is learning from thosewho already have the knowledge one seeks, and the second is discovering the knowledge one seeks on one's own. The book begins with a brief look at some of the Socratic dialogues where Plato appears to recommend the former approach while simultaneously indicating various difficulties in pursuing it. The remainder of the book focuses on Plato's recommendation in some of his most important and centraldialogues - the Meno, Phaedo, and Republic-for carrying out the second approach: de novo inquiry. The book turns first to the famous paradox concerning the possibility of such an inquiry and explores Plato's apparent solution. Having defended the possibility of de novo inquiry as a response toClitophon's challenge, Plato explains the method or procedure by which such inquiry is to be carried out. The book defends the controversial thesis that the method of hypothesis, as described and practiced in the Meno, Phaedo, and Republic, is, when practiced correctly, Plato's recommended method ofacquiring on one's own the essential knowledge we lack. The method of hypothesis when practiced correctly is, then, Platonic dialectic, and this is Plato's response to Clitophon's challenge.