 Since Dworkin’s initial challenge to Hart’s positivism in the mid-1960s, a robust but unresolved debate over the concept of law has riven the philosophy of law. Hart [1994] viewed this debate with some perplexity as he thought the two sides had not engaged. More pointedly, he thought there was nothing to argue about as he felt that he and Dworkin asked two different questions; and, consequently, explicated two distinct concepts of law. 