Still, I am puzzled, for what follows from this? Am I so bound up with my body and my senses that I cannot exist without them? But I have convinced myself that there is nothing at all in the universe—no sky, no earth, no minds, no bodies. So then, is it the case that I, too, do not exist? No, not at all: if I persuaded myself of something, then I certainly existed. But there is some kind of deceiver, supremely powerful and supremely cunning, who is constantly and intentionally deceiving me. But then, if he is deceiving me, there is no doubt that I, too, for that very reason exist. Let him
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