such only through perception because the body has to be doubted, so the mind must act alone. Like the wax, one can tell that it is still wax through intellect alone. This proposes that perception is the only measure of reality, and the conception of an object is independent from perception. Therefore, if this is the case, it is impossible to have a change in perception that causes a change in conception. This argument leads Descartes’ into some trouble. For, if one sees coats and hats walking around in the street, one’s nature of light- intuition, would tell one that those things inside of them are people, because that is what we are used to seeing. So, through intellect alone, one is able to determine that those are people out on the street, yet what if that conception changes. According to Descartes, it cannot, but the thing inside the coats and hats might be trained chimpanzees walking around. So suddenly, one realizes that the perception of the coats and hats was wrong, and that the conception changed. Therefore, just as Descartes has the perception that he is doing the doubting, because of the lack of empirical evidence and the unreliable quality of perception, through his method Descartes cannot be clearly and distinctly sure of anything....
