This work is in no way intended as a commentary on the second Cri tique, or even on the Analytic of that book. Instead I have limited myself to the attempt to extract the essential structure of the argument of the Analytic and to exhibit it as an instance of a transcendental argument (namely, one establishing the conditions of the possibility of a practical cognitive viewpoint). This limitation of scope has caused me, in some cases, to ignore or treat briefly concrete questions of Kant's practical philosophy that deserve much closer consideration; and in other cases it has led me to relegate...