It is generally assumed that hinge-commitments are deprived of an epistemically normative structure, and yet, that although groundless, the acceptance of Wittgensteinian certainties is still rational. The problem comes from the intellectualist view of hinge-approvals which many recent proposals advance—one that falls short of the necessities and impossibilities pertaining to what would be the right description of how it is like to approve of hinges. I will raise the Newman-inspired worry as how to cash the abstract acceptance of principles of (...) enquiry into real assent, as well as the question about how to extend normativity all the way back to foundations. It is my aim here to argue that ethical normativity is the only kind of normativity capable to ground the rationality of hinges. In defence of this, I will draw some consequences from Ernest Sosa’s claim that hinges about the external world are logically related to the _cogito_. (shrink)