 Traditionally, modal epistemologists have assumed that we cannot gain knowledge of modality by investigating what is actually the case (see, e.g., Craig 1985; Peacocke 1999). In particular, it seems that our perceptual capacities on their own cannot yield knowledge of what is possible and necessary. Perception, so the story goes, shows us at best how things are, not how they could have been or must be. If necessity is truth in all possible worlds, and perception only provides us with evidence for how the actual world is, how can we perceive necessity? Similarly, if non-actualized possibilities have no truth-maker in the actual world, since they are non-actualized, how can we perceive possibility? One might infer from how things are that they might be a certain way, but how can one perceive how things merely could be? In light of these considerations, perception has been thought to be categorically inappropriate for gaining modal knowledge. Recently, modal epistemologists have challenged the traditional stance. In particular, some have switched the focus of the epistemology of modality from far out claims about the possibility of zombie worlds to every-day modal claims, such as whether the couch could make it up the stairs, or that Joel can climb the boulder.