It is an extraordinary thing that Descartes' famous Cogito argument is still being puzzled over; this paper is another fragment in an untiring tradition of puzzlement. The paper will argue that, if I were to ask the question the Cogito could provide for a positive answer. In particular, my aim in this is to argue, in opposition to recent discussion by John Campbell, that there is a way of construing conscious thinking on which the Cogito can be seen to provide (...) a non-question begging argument for one's own existence. (shrink)