Noncognitivism is the view that moral truths are not the kind of truths that can be known. There are a number of types of noncognitivist theory, each of which provides a slightly different analysis of moral statements. What they have in common is that each of their analyses renders moral statements as neither true nor false. In order to be known, though, a statement must be true. If then, as the noncognitivist holds, no moral statements has a truth-value, then moral truths cannot be known.