Theaetetus, The criteria of knowledge

Plato’s Theaetetus is a logical, argumentative, and critical dialogue with an aporetic and dramatic style. Plato seeks the definition of knowledge. Simultaneously, Plato forms the criteria for the knowledge search through a discussion of three definitions: a. knowledge is perception, b. Knowledge is true judgment (opinion), c. knowledge is true judgment accompanied by logos. These definitions are shown to be unsatisfactory. These criteria are: a. The unity of knowledge objects, b. its controllable character, c. the purity of the concept, d. the logical nature of knowledge, and e. its evolving and dynamic character. Plato’s intention in this dialogue -among others - is a kind of epistemological critique.