The second argument is, of course, quite famous and this was the method. This he came to using the method of doubt. So, he started asking himself the question, “What can I be sure of?” and he said, “I believe there’s a God, but honestly, I can’t be sure there’s a God; I believe I live in a rich country but maybe I’ve been fooled.” He even said, “I believe I have had friends and family but maybe I am being tricked. Maybe an evil demon, for instance, has tricked me, has deluded me into thinking I have experiences that aren’t real.” And, of course, the modern version of this is The Matrix. The idea of The Matrix is explicitly built upon Cartesian—Descartes’ worries about an evil demon. Maybe everything you’re now experiencing is not real, but rather is the product of some other, perhaps malevolent creature
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