Public reason liberalism requires that coercive measures be justified to all reasonable citizens. As a result, when publicly deliberating, citizens must only invoke those beliefs that all citizens could reasonably accept, on some level of idealization. Religious beliefs are routinely taken as the paradigmatic example of a non-public reason: beliefs that not all citizens can reasonably endorse. This dissertation argues that to fully evaluate the plausibility of the public reason view, we must look to epistemology. Public reason\u27s commitments to public justification and to limiting public dialogue (in part) on the basis epistemic properties require considering its epistemological ramifications. This dissertation argues that public reason i...