This theory was the only important attempt, prior to Ayn Rand. to formulate a this-worldly but non-skeptic view of concepts. Unfortunately. Aristotle's view retained elements of Platonic intrinsicism, leaving reason vulnerable to attack by skeptics. This course will analyze Aristotle's theory, and its consequences-good and bad-both for Aristotle's philosophy and for later Aristotelianism. We will see how a theory of concepts affects every branch of philosophy. and illustrate the contrast between Objectivism and intrinsicism.