 But Cook Wilson was led here to a further thesis. If one is prepared to say ‘I believe p’, when one is not sure that evidence already known is sufficient to claim that ‘I know that p’, then it looks as if one should always be in a position to know if one knows or if one merely believes. He argued, however, that ‘knowing that one knows’ should not mean that, once a particular piece of knowledge has been obtained, one should then decide if it counts as knowledge or not, because this decision would count again as a piece knowledge and “we should get into an unending series of knowings” (SI, 107). This is why he insisted that knowing that one knows “must be contained within the knowing process itself”: