Discussions of certainty in epistemology often focus on Ludwig Wittgenstein’s notion of “hinges,” the background certainties that make justification and epistemic evaluation possible. While the nature and epistemic status of hinges remain contested, this paper argues that they are best understood not as propositions or merely individual commitments, but as socially grounded, non-propositional certainties. Although hinge statements often take the form of empirical propositions, they function beyond justification and empirical testing while structuring the possibility of empirical knowledge. Engaging with interpretations such as Moyal-Sharrock’s account of verbalized non-propositional certainties and Pritchard’s notion of hinge commitments, I argue that hinges are instantiated pragmatically through action, embodied practice, and social participation. Drawing on theories of collective intentionality, I propose that hinges constitute a shared normative background that enables coordinated epistemic practices and underlies the possibility of inquiry. This account clarifies how background certainties are acquired, maintained, and shared across individuals, while also helping explain disagreement and misunderstanding when such certainties diverge. More broadly, it highlights the fundamentally social character of human cognition and knowledge, opening new avenues for dialogue between epistemology, cognitive science, and related disciplines.
