 The error theorist is a cognitivist: maintaining that moral judgment consists of beliefs and assertions. However, the error theorist thinks that these beliefs and assertions are never true. (The error theorist contrasts here with what can be called the “success theorist.”) Moral judgments are never true because the properties that would be necessary to render them true—properties like moral wrongness, moral goodness, virtue, evil, etc.—simply don’t exist, or at least are not instantiated. Defenders of moral error theory include Mackie 1977, Hinckfuss 1987, Joyce 2001, and Olson 2014.