 It is not entirely clear what Russell took these overwhelming arguments to be. But one of them seems to have proceeded from a Moorean premise. Russell took Moore to have refuted naturalism, the view that although there are moral truths, nothing metaphysically out of the ordinary is required to make them true. Conversely Russell took Moore to have proved that if there were to be moral truths about which things were good or bad as ends rather than means, the truths in question would require spooky non-natural properties of goodness, badness etc—quite unlike the “natural” properties posited by science and commonsense—to make them true. In the supposed absence of such properties, he was driven to the conclusion that moral judgments (at least judgments about goodness and badness) were either all false or neither true nor false. Thus Russell remained a renegade Moorean even after he had ceased to believe in the Moorean good. But if Moore was a decisive influence on Russell, it seems that Russell was an important influence on Moore. For Moore may have been driven to invent his most famous argument for a non-natural property of goodness—the Open Question Argument—by the need to deal with a naturalistic theory of Russell’s.