 Even though Mally regarded many of his theorems as surprising, he thought that he had discovered an interesting concept of “correct willing” (richtiges Wollen) or “willing in accordance with the facts” which should not be confused with the notions of obligation and willing used in ordinary discourse. Mally’s “exact system of pure ethics” was mainly concerned with this concept, but we will not describe this system because it belongs to the field of ethics rather than deontic logic.