How do you know that right now you’re not being manipulated by an evil demon? It seems that you can’t. Maybe there’s some suggestion of the evil demon’s handiwork—the fact that you’re now reading about evil demons, for example; evil demons with a sense of humor might enjoy causing people to think about evil demons. Even without hints like this, it seems impossible to exclude the evil-demon hypothesis entirely. But if you can’t know that you’re not being manipulated by an evil
