Descartes went on to mention the three hypothesis that he feels are ways to doubt his beliefs in the first meditation but as he goes on to the second meditation, he comes up with a belief that cannot be doubted. As he concluded his first meditation, he came up with his strongest hypothesis and that dealt with evil demons deceiving him but with this new belief that cannot be doubted, he feels that he must exist to even be led on towards deception from that evil figure. Because he was doubting his body and simply his existence, the belief of cogito argument is concluded. This cogito argument relies on pretty much the existence of thought and just simply not being able to put doubt into his sense of thinking. He eventually can conclude that because
