As the discussion of this section reveals, there is plenty of room for variety among forms of EC—both about, in Jonathan Schaffer’s (2005, 115) phrase, “which epistemic gear the wheels of context turn,” and about the exact mechanism or rule governing such shifts. Once again, however, there is general consensus among the relevant theorists that context is to be understood in terms of such things as the interests, purposes, expectations, salient possibilities, and so forth, of the attributor. Further, there is consensus that, understood along such lines, context affects the truth-conditional content of ‘knowledge’ sentences—and, in fact, that this phenomenon is what underlies and explains the power of skeptical arguments, even though it also reveals why those arguments do not threaten our ordinary claims to “know”.