 Only negative norms can be exceptionless (and not all negative moral norms are). If affirmative norms could be exceptionless, there would be inescapable conflicts of obligation, but since morality is simply (the set of standards of) full reasonableness, there can be no conflict of duties each truly and inescapably obligatory in one and the same situation: one cannot truly be perplexus simpliciter – that is, in a dilemma such that, through no fault of one’s own, any choice one makes will be immoral. (It is, however, possible that my prior wrongful choices or my culpable negligence in forming my conscience put me into a situation such that I have applicable and irreconcilable duties and will be in breach of one or more of them whatever I choose or do or omit: I am then perplexus secundum quid, that is, in a dilemma but of a qualified, derivative kind, only in a weak sense unavoidable.)