Dr. Notomi presents a new interpretation of one of Plato's most important dialogues, the Sophist, addressing both historical context and philosophical content. He shows how important the issues concerning the sophist (professional teacher and rhetorician in ancient Greece) are to the possibility of philosophy. His new approach to the whole dialogue reveals that Plato struggles with difficult philosophical issues in a single line of inquiry; and that Plato shows, in defining the sophist, his conception of the authentic philosopher.