 First consider the possibilities that define 1-intensions. On the epistemic interpretation, the possibilities are not metaphysically possible contexts of use, but epistemically possible “scenarios”: maximally specific hypotheses about what one’s actual environment might be like that cannot be ruled out through apriori reasoning alone. Scenarios provide a complete characterization of the entire history of a universe, down to the last microphysical detail. They also provide perspectival information—a notional “center”—that indicates the location from which the hypothetical universe is to be considered. The crucial point is that scenarios are defined by their epistemic role: they represent ways we can conceive of the actual world, within which we can try to identify familiar objects, kinds or  properties.[19]