Abstract

Kant's purpose in the Critique of Pure Reason was to describe the nature and set the boundaries of human knowledge. At the heart of this ambitious enterprise is his doctrine of apperceptive self-identity. He insists that in order for us to know anything, there must be a unitary self capable of being aware of its own identity over time. Unfortunately, Kant's descriptions of this unitary 'I think' are extremely obscure, and his accounts of how it functions in the first Critique's overall theory of knowledge are extremely problematical. ;I believe that much of the diversity of opinion about Kant's theory of self-identity has arisen owing to a lack of consensus about what really constitutes an adequate account of self-identity in the first Critique. I contend that an adequate account must satisfy four basic requirements. First, the theory must be compatible with his solutions to certain philosophical problems that emerge in the analysis of ordinary human cognition. Second, the theory must be consistent with the principles underlying his general account of human knowledge. Third, the theory must explain the cognitive relation between the momentary phenomenal self and the transtemporal, a priori unity of apperception. And fourth, it must explain the ontological status of this unitary 'I think'. ;I contend that the key to Kant's theory of apperceptive self-identity is found in his notion of synthesis. I look closely at what synthesis means for Kant, what he does with it in his account of human knowledge, and how his detailed account of objective synthesis may be used to shed light upon his more obscure accounts of the unitary synthesizing agent. I suggest that Kant's theory of apperceptive self-identity may be understood as a more generalized version of his theory of schematism. Both involve the synthetic unification of something pure and actively formal with some empirical and passively given content; and both are intimately connected with the nature of time. I show how these two facts may be used to elucidate the nature of the apperceptive subject, and how Kant's theory is able to satisfy the four requirements