Chapter 3, “The Form of Reflexivity and the Expression of Self-Presence”, explores the role of transcendental apperception for inner experience according to the Transcendental Deduction (B) of the first Critique. By showing the insufficiencies of two alternative views defended in the literature, namely the psychological view and the logical view, the chapter argues that transcendental apperception is the capacity for reflexive consciousness in general. Its characteristic form, the general form of reflexivity, is the most general condition on any conscious representation and can be expressed by the phrase “I think”. The chapter concludes by arguing that the phrase “I think”, if in fact attached to a representation in thought, expresses self-reference to oneself as individual thinker, yet without determining oneself.

Focusing on its 1781 version, Chapter 5 interprets the transcendental deduction in light of Kant’s overall investigation into the conditions under which metaphysics is possible. Whereas most commentators take the text to be mainly concerned with the conditions of possibility of empirical cognition, it seeks to demonstrate that the various strands of Kant’s investigation primarily aim to identify the conditions under which categories can be used to produce objects of a priori cognition as such. On Kant’s account, categories can contribute to the production of such objects only if they function as a priori rules for the thoroughgoing unification of successive representations, which is not the case if they are used to determine alleged objects such as the soul, the world as such, and God. Thus, I contend that the transcendental deduction passes a balanced judgment on Wolff’s unqualified affirmation of the possibility of a priori cognition of objects and Hume’s unqualified rejection of the same.