  In Kelsen’s argument, P stands for the fact that legal norms are “ought” statements , and Q is the presupposition of the basic norm. In other words, the necessary presupposition of the basic norm is derived from the possibility conditions for ascribing legal significance to actions and events. In order to interpret an action as one of creating or modifying the law, it is necessary to show that the relevant legal significance of the act/event is conferred on it by some other legal norm. At some point, as we have noted, we necessarily run out of legal norms that confer the relevant validity on law creating acts, and at that point the legal validity has to be presupposed. The content of this presupposition is the basic norm.