Faced with surprising behavior in the course of a game, the players must decide what then to believe. Their strategies will be based on how their beliefs would be revised, which will in turn be based on their epistemic priorities—whether an unexpected action should be regarded as an isolated mistake that is thereby epistemically independent of beliefs about subsequent actions, or whether it reveals, intentionally or inadvertently, something about the player’s expectations, and so about the way she is likely to behave in the future. The players must decide, but the theorists should not—at least they should not try to generalize about epistemic priorities that are meant to apply to any rational agent in all situations. (Stalnaker 1998: 54)