Epistemic Modality and Coordination under Uncertainty

Communication facilitates coordination, but coordination might fail if there's too much uncertainty. I discuss a scenario in which vagueness-driven uncertainty undermines the possibility of publicly sharing belief. then show that asserting an epistemic modal sentence, 'Might p', can reveal speaker's uncertainty, and this may improve chances despite lack common ground. This provides game-theoretic rationale for modality. The account draws on standard relational semantics modality, Stalnaker's theory assertion as informative update, Bayesian framework reasoning under