Rationality and hinge disagreements: A critique of constitutivism

Abstract Can we rationally choose between philosophical hinge commitments if they resist argument and evidence? At first glance, such choices seem arbitrary. Coliva and Palmira (2020, 2021) and Coliva and Doulas (2022) argue, however, that adopting a constitutivist account of hinges allows for rational choice through what Coliva terms ‘extended rationality’. They claim that accepting the hinge ‘there are physical objects’ is constitutive of epistemic rationality. This paper challenges that view, arguing that the idealist hinge is misrepresented in their work and that this particular hinge may not ground rational belief. The paper shows that constitutivism, though promising, faces a criterion problem in philosophical hinge disagreements. It concludes that while constitutivism and extended rationality can explain belief rationality, they must be supported by independent criteria for selecting between competing hinges.