Logic after Wittgenstein

Wittgenstein's later rejection of the externalist Tractarian picture of logic according to which all rationally analysable discourse is properly understood as truth-functional rules out any conception of logic as the study of universal features of discourse. Given later references to 'the logic of our language', some conception of logic appears to survive even on Wittgenstein's later view. However, given his rejection of any conception of philosophical theory as explanatory or hypothetical, Wittgenstein seems to be forced into descriptivism. Despite these constraints, I attempt to show that a valuable account of logic consistent with Wittgenstein's critique can be identified. That possibility raises the question: can any conception of formal logic as valuable modulo natural language survive Wittgenstein's later change of heart? Taking Wittgenstein's rejection of Tractarian conceptions seriously, logic is relativised to language-games in general and, perhaps, localised to particular language-games. Looking...