Abstract
This article argues that plato's choice of the dialogue as a vehicle for his philosophy and aristotle's choice of an objective compressed lecturing style (in his later works) has less to do with differences in philosophical doctrine and more with differences in pedagogic aim. Plato aimed at teaching pupils to begin thinking and to keep re-examining the foundations of their thought, aristotle at advancing the sum of human knowledge. This in its turn, it is argued, was connected with a difference in epistemology and with aristotle's greater optimism about our ability to avoid error and to advance in knowledge