This chapter ascribes the “specification thesis” to Kant: moral virtue is specification of general cognitive virtue, and general cognitive virtue goes by the name of “healthy understanding”. The chapter considers the relative absence of Kantian ideas from contemporary virtue epistemology, and in this context draws some preliminary boundaries around what can plausibly count as a Kantian notion of cognitive virtue. The chapter then argues that healthy understanding must count as good cognitive character. Its status as cognitive virtue, and its relation to moral virtue, is then argued for on the basis of Kant’s remarks about natural and moral perfection in the Doctrine of Virtue of the Metaphysics of Morals