In my “Promising and Supererogation” I argue that one cannot fulfill promises to perform supererogatory actions (such as “I hereby promise to perform one supererogatory action every month”). In a response to my paper, David Heyd argues that there is an alternative solution to the problem I raise. While I agree with much that Heyd says about the examples he discusses, his proposed solution involves a crucial alteration of the problem; his proposed solution does not solve the problem I present.

A paradox involving promises to perform supererogatory actions is developed. Several attempts to resolve the problem, focusing in particular on changing our understanding of supererogatory actions, are explored. It is concluded that none of the proposed solutions are viable; the problem lies in promises with certain contents, not in our understanding of supererogation.