Emotivism is the doctrine that all evaluative judgments and more specifically all moral judgments are nothing but expressions of preference, expressions of attitude or feeling, insofar as they are moral or evaluative in character. Particular judgments may of course unite moral and factual elements. ‘Arson, being destructive of property, is wrong’ unites the factual judgment that arson destroys property with the moral judgment that arson is wrong. But the moral element in such a judgment is always to be sharply distinguised from the factual. Factual judgments are true or false; and in the realm of fact there are rational criteria by means of which we may secure agreement as to what is true and what is false. But moral judgments, being expressions of attitude or feeling, are neither true nor false; and agreement in moral judgment is not to be secured by any rational method, for there are none. It is to be secured, if at all, by producing certain non-rational effects on the emotions or attitudes of those who disagree with one. We use moral judgments not only to express our own feelings and attitudes, but also precisely to produce such effects in others