 But this is puzzling. It is not puzzling that the sentence “The murderer might have been on campus at midnight” could be true when uttered in the first context but false when uttered in the second context; that fact could be accommodated by any number of contextualist treatments of epistemic modals, which would dissolve the puzzle by saying that the sentence expresses different propositions relative to the two contexts. The puzzle is that the truth of the second sentence seems to imply that the proposition expressed by the first—which we agreed was true relative to that context—is false relative to the second context. Here we don’t have (or don’t just have) sentences varying in truth-value depending on context; we seem to have propositions varying in truth-value depending on context. The relativist about epistemic modals takes appearance here to be reality, and holds that, in addition to worlds (and maybe times), propositions can sometimes differ in their truth-value relative to contexts of assessment (roughly, the context in which the proposition is being considered). (Note that it is not essential to the case that the two contexts of assessment are at different times; much the same intuitions can be generated by considering cases of “eavesdropping”, in which one party overhears the utterance of some other group which lacks some of its evidence.)