Wittgenstein is one of the most important and influential twentieth-century philosophers in the western tradition. In his Philosophical Investigations he undertakes a radical critique of analytical philosophy's approach to both the philosophy of language and the philosophy of mind. The Routledge Guidebook to Wittgenstein's Philosophical Investigations introduces and assesses:Wittgenstein's lifeThe principal ideas of the Philosophical InvestigationsSome of the principal disputes concerning the interpretation of his workWittgenstein's philosophi