 From time to time, the Liar has been argued to show us something far-reaching about philosophy. For instance, Grim (1991) has argued that it shows the world to be essentially ‘incomplete’ in some sense, and that there can be no omniscient being. McGee (1991) and others suggest that the Liar shows the notion of truth to be a vague notion. Glanzberg (2001) holds that the Liar shows us something important about the nature of context dependence in language, while Eklund (2002) holds that it shows us something important about the nature of semantic competence and the languages we speak. Gupta and Belnap (1993) claim that it reveals important properties of the general notion of definition. And there are other lessons, and variations on such lessons, that have been drawn.