Abstract

Aristotle’s concept of subject, or hypokeimenon, has been understudied in scholarship, in part because, since Aristotle associates it with his concept of ousia or substance, discussion of hypokeimenon is often eclipsed by that of substance. It is often thought that Aristotle introduces hypokeimenon as the criterion for being a substance in his Categories. In this essay I argue that he does not, thus calling into question some entrenched views about Aristotelian substance. Divorcing hypokeimenon from substance in this way emphasizes the need for an account of hypokeimenon in its own right. In this essay I also begin this work by using an often overlooked pointer in Categories towards a discussion in An. Po., in whose context Aristotle's logical notion of hypokeimenon begins to become more clear.