Abstract
The validity of the legal system was thought by jus philosophers such as Hans Kelsen and Herbert Hart, respectively, the fundamental hypothetical norm and the rule of recognition. This article will address these concepts, with the goal of conducting a comparative study between the two, and then pointing out their similarities and differences. To do so, we used the deductive approach and bibliographic research. At the end of the article, similarities were perceived, both being theoretical constructions of legal positivism of criterion of validity for the legal order, and differences, a logical-transcendental presupposition of validity (Kelsen) as an element of fact of validity (Hart).
Keywords:
Jurisprudence; Basic Norm; Recognition Rule