As AGNOSTIC discovered, even the hypothesis of possible mind control could not be integrated with his other knowledge. Indeed, once such a notion is conceded, even as a mere possibility, one is logically obliged to surrender all of one's knowledge, including our axiomatic understanding (pp. 1.2:1-5) that reality exists and that we are aware of it. It might be wondered, however, whether perhaps the alien-mind-control hypothesis is a special case, inasmuch as it executes such a blatant assault on human rationality. Could other kinds of arbitrary notions be admitted as possibilities with less pernicious effects?

MYSTIC A:	But if you cannot evaluate the probability of alien mind control, then that means you have no idea whether your mind is working properly or not. In other words, you have no basis for believing in your mind at all. So how can you claim to "know" that "1 + 1 = 2"—or even that such an equation is "probable"?
AGNOSTIC:	OK, I admit that I do not really know anything. Or, at least, I think I don't. I mean, I think that I think that I don't. . . . (silence)