  The ‘deduction of the categories’ should now be complete. Strangely enough, the chapter has only nicely got started. In the first edition version, for example, we have only reached A106, about one-third of the way through the chapter. At this point, Kant introduces the notion of transcendental apperception for the first time and the unity of such apperception, the unity of consciousness. Evidently, something is happening (something, moreover, not at all well heralded in the text). We will see what when we discuss Kant’s doctrine of synthesis below.