Known as "Hart-Dworkin Debate," the clash of opinions between these two authors generated intense discussion about legal positivism and theories that seek to refute its core arguments. In this context, Ronald Dworkin strives to rebuke the positivist doctrine demonstrating that its elementary notions are not able to produce an effective theory about the nature of law. In this article, I analyze the criticism launched by Dworkin to legal positivism and concepts of Herbert Hart, with particular attention to the concept of discretion that Dworkin assigns to positivism. From a theoretical discussion involving the major works of these authors, I try to confirm the hypothesis that modern positivist theory is not committed to t...