In this lead of exactly fifty words I feel obliged to warn you NOT to read this article if you are both very susceptible to hypnotic suggestions and in an environment where being distracted would be a really bad idea. Also, it should make you feel ever so slightly curious.
Door Hendrik Siebe
Once I read Nozick’s suggestion that the mere presence of a hypnotist could destroy my knowledge that I was in philosophy class,1 I was interested. For those of us who are not so well-acquainted with Nozick’s account of knowledge, suffice it to say that it requires our beliefs to be strongly sensitive to truth. Thus, would I believe that I am in class if I were not in class, then, according to Nozick, I do not know that I am in class even when, in fact, I am. Of course, under normal circumstances I would not believe that I am in class if I were not. However, with the hypnotist hanging around, the closest possible world in which I were not in class might very well be one in which he would cause me to believe that I am. But then, my belief would not be very sensitive to the truth of the matter, and skeptical worries follow.