You just believe that because … it’s a hinge

This paper looks at the genealogical challenge encapsulated in the schema “You just believe that because . . .” through the lens of hinge epistemology. It is claimed that hinges are typically held just because one has been brought up to believe them. It is further claimed that, while fitting into the YJBTB schema, hinges are rationally held when different de facto hinges are taken for granted merely because of one’s position in history. Moreover, they are rationally held if they are de jure hinges, constitutive of epistemic rationality. By contrast, holding different de facto hinges, while aware that one’s reasons for them are either question-begging or no stronger than the ones in favor of incompatible ones, is not rational. The latter would be cases of “deep disagreement”—that is, disagreement that is in principle insoluble. Hence, the nature and epistemic significance of the genealogical challenge are clarified.