Out in the Open: Public Evidence and the Limits of Experience

Public evidence plays a central role in the justification of scientific theories—but does its importance extend beyond science, for instance, to political or religious belief? To address this question, we first need a clear account of public evidence. This paper de- velops such an account, characterizing public evidence as non-experiential evidence that meets the non-factive epistemic conditions for common knowledge. I argue that public evidence not only underwrites the justification of scientific theories but also constrains how experience can justify belief more generally. The result is a novel account of public evidence with broad applicability across domains of inquiry.