 We have been helping ourselves to the ideas of a normative property and a normative fact, but we haven’t yet considered in a systematic way views about what the normativity of such properties and facts might consist in. As we explained, the queerness argument for the error theory rests on the idea that some property of normative facts is queer, and the leading candidate seems to be the normativity of the normative facts. One way to answer the queerness argument, then, would be to provide an explanation of what the property of being normative consists in, and a naturalistic explanation would ideally put to rest the worry that there is something queer about normativity. This is one reason to take seriously the question whether normativity can be explained naturalistically.