Before we can decide that our concepts of law and of legal obligation are myths, we must decide what they are. We must be able to state, at least roughly, what it is we all believe that is wrong. But the nerve of our problem is that we have great difficulty in doing just that. Indeed, when we ask what law is and what legal obligations are, we are asking for a theory of how we use those concepts and of the conceptual commitments our use entails. We cannot conclude, before we have such a general theory, that our practices are stupid or superstitious.

Ronald Dworkin, Ronald Dworkin - The Model …, loc. 12