 The epistemological arguments against descriptivism have a similar structure to the modal arguments. Consider again the proposition (K). Someone who uses the term ‘C’ competently should be thereby able to come to know that (K) is true, in virtue of grasping the meaning of ‘C’. Thus (K) should be a priori. So counterexamples to descriptivism would be cases (i) where although one knows that some thing is of the kind C one cannot thereby come to know that it possesses the property complex D, or (ii) where although one knows that some thing possesses the property complex D, one cannot thereby come to know that it is of the kind C.