Evaluating Wright and Noonan's Externalist Arguments against Skepticism

not a brain in a vat, but without the use of any auxiliary premises, they can not prove that we are not brains in a vat; (2) Contrary to Wright’s claim, this premise of his argument that In BIVese, “brain-in-a-vat” does not refer to brains-in-a-vat, and its result, that is, that my language is not BIVese, lead his argument to be epistemically circular; and (3) Noonan’s attempt to avoid epistemic circularity has not led to the desired result, and his argument, like Wright’s, is epistemically circular.