Even those who deny moral absolutes have at least one moral absolute: “You should not believe there are moral absolutes. You should believe there is no morality.” In effect, they contradictorily have a morality about no morality. They say you should (“should” entails moral obligation or duty) believe there are no moral absolutes. This is illustrated by the ethics professor, committed to moral relativism and denying moral absolutes, who will absolutely demand that his students not cheat on his exams.