Abstract

The social fact thesis, is, roughly, that law is ultimately a matter of social fact. Mark Greenberg and Kevin Toh have launched transcendental arguments against important or interesting general versions of the social fact thesis. Together, they can be read as posing a dilemma for the thesis. Suppose that many correct assertions of law are normative. Then, according to Toh, the considerations in virtue of which they are correct cannot ultimately be social facts, because the derivation of any normative conclusion requires a normative premise. Suppose that correct assertions of law are not normative. Then, according to Greenberg, they cannot state legal facts in virtue of social facts alone, because the very nature of law requires a particular kind of rational connection between determinants of legal facts and legal facts. Social facts cannot meet this demand; (non-legal) normative facts are needed. In short, Greenberg and Toh together claim that the social fact thesis is consistent with neither the existence nor the normativity of law. This essay meets their challenge.