Abstract

The conception of two kinds of practical identities, which Korsgaard introduces in the Sources of Normativity, helps her explain how universal categorical reasoning is compatible with the moral content of individual practical decisions. Based on this conception, she devises an interpretation of the Kantian as if principle amended by her argument for the public shareability of reasons. I suggest that, in doing so, Korsgaard steps too far away from Kant’s architectonic approach to the question of why moral norms bind us, and that, as a result, the Korsgaardian explanation, as it stands, cannot be accomplished.