  Some non-cognitivists have argued that this uncontroversial datum supports their theories against rival alternatives. Hare seems to have introduced the term ‘supervenience’ to the philosophical literature (Hare 1952, 145) and he suggested that his own theory, universal prescriptivism, was uniquely placed to explain it. Insofar as moral prescriptions were by their nature universal they would prescribe or proscribe any action which was sufficiently similar to the action up for evaluation. Thus Hare included supervenience as one of the phenomena that any adequate metaethical theory should explain and he counted it as a point in favor of his theory that it did so. But the feature of his theory that did the explanatory work was not its non-cognitivism – rather it was that it required the judgments to be universal in the ways he specified. In fact, Hare himself suggested that the supervenience of moral judgments on descriptive features was part and parcel of these judgments having a secondary descriptive meaning (Hare 1963, 7–22).