Nevertheless, we do use the concepts of law and legal obligation, and we do suppose that society's warrant to punish and coerce is written in that currency. It may be that when the details of this practice are laid bare, the concepts we do use will be shown to be as silly and as thick with illusion as those the nominalists invented. If so, then we shall have to find other ways to describe what we do, and either provide other justifications or change our practices. But until we have discovered this and made these adjustments, we cannot accept the nominalists' premature invitation to turn our backs on the problems our present concepts provide.

Ronald Dworkin, Ronald Dworkin - The Model …, loc. 17