chapter  1
152 Pages

Theory of Knowledge

THE discussion of epistemological questions was begun, I suppose, by the fifth century Sophists and in particular by Protagoras: but there was a good deal left for Plato to contribute. It will be convenient to discuss his contributions mainly in terms of three central concepts, namely aisthêsis (perception or sensation), doxa (belief, opinion, judgment) and epistêmê or gnôsis (knowledge or understanding).