Antinomy of Reason or Transcendental Deduction? Making Sense of the Dialectic of Pure Practical Reason

Abstract The present article focuses on the antinomy of pure practical reason and the deduction of the Highest Good in the Dialectic of Pure Practical Reason (in the second Critique). Although Kant claims that the Dialectic contains both the antinomy and the deduction, the boundaries dividing one from the other are at best vague. It is difficult to make out where the antinomy of practical reason ends and where the deduction begins. To locate both and to distinguish one from the other (with special attention paid to the modality of the Highest Good) are the chief aims of this article. Additionally but no less importantly, I show, against the line of criticism originally traceable to Schopenhauer, that the antinomy of practical reason amounts to more than a reflection of Kant’s “architectonic obsession.” Not only does the antinomy of practical reason correspond to a genuine dialectical problem in the Critique of Practical Reason, but it also shares a fundamental (even if not immediately apparent) similarity with the antinomy of pure speculative reason. Finally, I consider Kant’s transcendental deduction of the Highest Good against the backdrop of his other deductions, especially the deduction of the categories in the Critique of Pure Reason, and defend it against the charge of potential circularity.