Kant holds that the applicability of the moral ‘ought’ depends on a kind of agent-causal freedom that is incompatible with the deterministic structure of phenomenal nature. I argue that Kant understands this determinism to threaten not just morality but the very possibility of our status as rational beings. Rational beings exemplify “cognitive control” in all of their actions, including not just rational willing and the formation of doxastic attitudes, but also more basic cognitive acts such as judging, conceptualizing, and synthesizing.

Kant worries that if we are not free, morality will be nothing more than a phantasm for us. In the final section of the Groundwork, he attempts secure our freedom, and with it, morality. Here is a simplified version of his argument: A rational will is a free willA free will stands under the moral lawTherefore, a rational will stands under the moral lawIn this paper, I attempt to defuse two prominent objections to this argument. Commentators often worry that Kant (...) has not managed to establish that we are rational beings with wills in the first place, and that he equivocates in his use of ‘free’ between premise 1 and 2. I argue that both of these objections can be overcome, and thus seek to offer some hope for Kant’s approach in Groundwork III. (shrink)