 Anscombe focuses approvingly on some aspects of Descartes’ use of ‘I’ in the Meditations. Famously, he cannot doubt ‘I exist.’ But on the same grounds that he can doubt ‘I have a body’, he also can doubt ‘I am Descartes.’ After all, ‘Descartes’ is just the name of a human being, and he can doubt that he is any human being whatsoever – he can wonder whether he’s instead a brain in a vat. So, if the argument indeed establishes the non-identity of himself with this body, it likewise establishes the non-identity of himself with Descartes!