  Even more radically, it might be maintained that moral predicates do not even purport to refer to properties and that this explains why the relevant questions seem open. In particular, it has been argued that a non-cognitivist analysis of moral discourse can explain why the relevant questions seem open. The question, “I know its pleasant but is it good?” seems open on this account because one can admit that something is pleasant (or has whatever natural property you like) without having decided to approve (or disapprove) of the thing in question. It is easy enough to see why this would also block the inference to non-naturalism. For on a non-cognitivist account, as traditionally understood, moral predicates do not even purport to refer to properties but rather serve to express speakers’ pro- and con-attitudes. Hence, the non-cognitivist concludes, moral predicates do not refer to properties at all, much less non-natural ones (see, e.g., Ayer 1952). In fact, it is fair to say that non-cognitivists eventually gained at least as much mileage from the Open Question Argument as non-naturalists.