  Moore famously claimed that naturalists were guilty of what he called the “naturalistic fallacy.” In particular, Moore accused anyone who infers that X is good from any proposition about X’s natural properties of having committed the naturalistic fallacy. Assuming that being pleasant is a natural property, for example, someone who infers that drinking beer is good from the premise that drinking beer is pleasant is supposed to have committed the naturalistic fallacy. The intuitive idea is that evaluative conclusions require at least one evaluative premise—purely factual premises about the naturalistic features of things do not entail or even support evaluative conclusions. Moore himself focused on goodness, but if the argument works for goodness then it seems likely to generalize to other moral properties.