Since the publication of Dieter Henrich's classic paper, ‘The proof structure of the transcendental deduction’, in The Review of Metaphysics 22 , the transcendental deduction of the pure concepts of the understanding has been under focus in Kant studies in a very special way. The B-deduction seems to be a proof in two steps. Consequently, the focus has been on questions like, ‘What is the structure of the deduction?’, and ‘Why is the deduction carried out in two steps?’ No doubt (...) the structure of the deduction has been the most debated exegetical issue in Kant's theoretical philosophy, and the most important too, while the answers mirror one's overall understanding of Kant. (shrink)