 (3) A third, related objection is that Quine’s response to skepticism is unsatisfactory. Insofar as the challenge posed by skepticism is to establish the possibility of knowledge, making use of certain methods of belief-formation, common-sensical or otherwise, is hardly going to strike the skeptic as legitimate: “Such attempts to respond to the skeptic’s concerns involve blatant, indeed pathetic, circularity” (Fumerton 1994: 338). Granted, Quine claims that skeptical arguments inevitably trade on the fact of illusions, which would seem to make (other) appeals to common sense fair game. According to BonJour, however,