 Many philosophers are drawn to some type of S-naturalism in virtue of their M-naturalism: being a philosophical naturalist in the methodological sense sometimes leads a philosopher to think that the best philosophical account of some concept or domain will be in terms that are substantively naturalistic. However, it is important to notice that a commitment to Methodological Naturalism does not necessarily entail any substantive conclusions: methodologically, it is an open question whether the best philosophical account of morality or mentality or law must be in substantively naturalistic terms.