Kant and ‘Ought Implies Can’

Although Kant is often considered the founding father of the controversial principle ‘Ought Implies Can’ (OIC), it is not at all clear how Kant himself understands and defends this principle. This essay provides a substained interpretation of Kant's views on OIC. I argue that Kant endorses two versions of OIC: a version that is concerned with our physical capacities, and a version that posits a link between moral obligation and a volitional power of choice. I show that although there are important senses in which Kant's conception of OIC differs from the way in which OIC is discussed in recent philosophy, his account raises important issues for contemporary theory: for instance, it highlights the extent to which acceptance or rejection of OIC reflects convictions about the sources of normativity.