Abstract

Spellman argues that Aristotle developed his views about substance in response to Plato’s theory of forms. In particular, she argues that Aristotelian substances are as much like Platonic forms as possible, minus the latter’s separation. Whether ASs are like PFs depends, of course, not only on what one takes ASs to be like, but also on what one takes PFs to be like; accordingly, Spellman provides accounts of both. She argues that ASs are what she calls specimens of natural kinds. A specimen of a natural kind is not Socrates, but Socrates-qua-human-being: Socrates insofar as he is a human being. She argues that Socrates, and Socrates-qua-human-being are numerically the same, but not identical. They are not identical, because not everything true of Socrates is true of Socrates-qua-human-being. Socrates, for example, is snub-nosed, but Socrates-qua-human-being is not; for the latter has all and only the properties contained in the definition of human being.