 Standing against these considerations in favor of noncognitivism are a number of weighty problems. The most well-known challenge for noncognitivism is the so-called Frege-Geach problem. If “Stealing is morally wrong” is not even the kind of thing that can be true or false, then how can we make sense of it when it is embedded in logically complex contexts (such as “If stealing is morally wrong, then encouraging your brother to steal is morally wrong”), and how are we to make sense of it as a premise in a valid argument (since validity is, by definition, a truth-preserving relation)?