I offer Wittgenstein's Philosophical Investigations: Identity as Paradox, a work in which I propose that Ludwig Wittgenstein's Philosophical Investigations overturns traditional philosophy. Traditional philosophy takes the laws of thought to ground in identity law, which law states of identity that it is itself. This takes an identity to be a one-fold case of consistency, signified by it, reflexively by itself, and with the is functioning as a copula. My proposal is that Wittgenstein's thesis as an identity case is not a monistic consistency case signified by it, but is a paradox case signified by is. I have taken some 500 of Wittgenstein's language games in Investigations to evidence the identity-as-paradox thesis versus key philosophers of the western tradition, and have re-interpreted the games talk of each in terms of the identity-as-paradox thesis. I submit that philosophers find the Investigations baffling due to their thinking in terms of consistency logic rather than in terms of paradox grammar.