Hinge commitments and trust

According to the innovative account of the structure of rational evaluation offered by Wittgenstein in his final notebooks, published as On Certainty, our rational practices necessarily presuppose arational hinge commitments. These are everyday, apparently mundane, commitments that we are optimally certain of, but which in virtue of the 'hinge' role that they play in our rational practices cannot themselves enjoy rational support. Granted that there are such hinge commitments, what is the nature of the propositional attitude in play? Many commentators have described this propositional attitude as a kind of trusting, on account of how our hinge commitments are effectively a groundless kind of presupposition. In contrast, I want to push back against this way of thinking about hinge commitments and argue instead that it is crucial to our understanding of Wittgenstein's proposal especially in terms of its implications for radical scepticism to realize that hinge commitments are not presuppositions and that the hinge propositional attitude is not one of trusting.