 Siger of Brabant, on the other hand, dealt directly with skepticism and skeptical arguments in his Impossibile 2 and his Questions on the Metaphysics. Though, as Côté (2006) argues, he also declines to take skepticism to be a serious threat, he does take the time to address it. Most notably, Siger raises the following question for consideration in Impossibile 2: “everything that appears to us are illusions and similar to dreams, so that we are not certain of the existence of anything.” Siger has various responses in his discussions, but his most important claims are (a) that a failure of the senses in some cases does not automatically imply failure in all cases; and (b) that if a sense report is not contradicted by another, more reliable sense report, then it itself is reliable. Furthermore, Siger gives a rather unconvincing reductio, arguing that if the senses are unreliable, no knowledge at all is possible. Taking this as a reductio of skepticism obviously would do little to assuage the worries of the committed skeptic.