 Ludwig Wittgenstein also seems to connect certainty with indubitability. He says that “If you tried to doubt everything you would not get as far as doubting anything. The game of doubting itself presupposes certainty” (1969, §115). What makes possible doubting is “the fact that some propositions are exempt from doubt, are as it were like hinges on which those turn” (1969, §341). Although Wittgenstein’s view is sometimes taken to be—or to provide the basis for—an epistemically satisfying response to skepticism (see, e.g., Wright 2003 and 2004), it is hard to see the kind of certainty he has characterized as being epistemic, rather than merely psychological or moral, in nature (on this point, see Pritchard 2005; Coliva 2010 and 2012). Thus, when Wittgenstein says, “The difficulty is to realize the groundlessness of our believing” (1969, §166) it seems clear that the so-called hinge propositions are ones that we are psychologically incapable of calling into question. This is, of course, compatible with their being false.