 Non-naturalists deny that normative properties are natural ones, often because they hold that the normativity of these properties rules out their being natural ones. The idea here is that natural properties are not and could not be normative. But the issue whether a normative property could be a natural one is not the same as the issue whether normativity can be given a naturalistic explanation. Normative naturalists hold that normative predicates ascribe or refer to natural properties, and some if not all normative naturalists would contend that normative properties are natural ones. But this does not commit them to the view that normativity can be explained naturalistically. It is open to a normative naturalist to deny that normativity can be explained at all. So the dispute between naturalists and their opponents, including non-naturalists, cuts across the issue raised by our question.