 There is, then, a primitivism about normativity as such as well as a primitivism about normative properties. There is also a primitivist view about normative concepts according to which these concepts are not analyzable. Non-naturalists typically hold that both the normative concepts and the normative properties are primitive and unanalyzable (see entry on  moral non-naturalism).  Further, naturalists who are primitivists about normative properties might also be primitivists about the normative concepts. Indeed, even naturalists who reject primitivism about normative properties might nevertheless accept primitivism about the normative concepts, and thereby hold that the normative concepts are unanalyzable (see Railton 2003).