 Return to the case of Sartre’s student. Suppose that he joins the Free French forces. It is likely that he will experience remorse or guilt for having abandoned his mother. And not only will he experience these emotions, this moral residue, but it is appropriate that he does. Yet, had he stayed with his mother and not joined the Free French forces, he also would have appropriately experienced remorse or guilt. But either remorse or guilt is appropriate only if the agent properly believes that he has done something wrong (or failed to do something that he was all-things-considered required to do). Since no matter what the agent does he will appropriately experience remorse or guilt, then no matter what he does he will have done something wrong. Thus, the agent faces a genuine moral dilemma. (The best known proponents of arguments for dilemmas that appeal to moral residue are Williams 1965 and Marcus 1980; for a more recent contribution, see Tessman 2015, especially Chapter 2.)