 This way of defining moral dilemmas distinguishes them from the kind of moral conflict, such as Ross’s promise-keeping/accident-prevention case, in which one of the duties is overridden by the other. Arguably, Sartre’s student faces a moral dilemma. Making sense of a situation in which neither of two duties overrides the other is easier if deliberative commensurability is denied. Whether moral dilemmas are possible will depend crucially on whether “ought” implies “can” and whether any pair of duties such as those comprised by (1) and (2) implies a single, “agglomerated” duty that the agent do both A and B. If either of these purported principles of the logic of duties is false, then moral dilemmas are possible. 