Meta-Ethics

Moore’s arguments begin a debate that revives sentimentalist and rationalist arguments. According to Moore, ‘good’ is indefinable, because there is no definition of it that mentions only ‘natural’ properties. Non-naturalist objectivists argue that we know about objective moral properties, but not in the way we know about other properties. Non-cognitivists argue that goodness is not an objective property at all; when we say that something is good, we are not stating a fact about it, but expressing an emotion, or issuing some prescription. Even if objectivism is correct about the meaning of moral judgments, we may still deny that any moral judgments are true, on the ground that we have no reason to believe that there are any moral facts of the sort that objectivists claim to describe. Further discussion of these arguments against objectivism requires closer attention to the difference between moral concepts and moral properties.