  ‘Know’ Speakers in some contexts may judge that the sentence ‘John knows that the bank will be open on Saturday’ is true. Speakers in other contexts who are aware of the same facts about John may, at the same time, judge that this same sentence is false. Consequently some philosophers hold that ‘know’ has different contents in different contexts, depending on the standards of justification that speakers of the context take for granted, or depending on the epistemic alternatives that are salient to the speakers of that context. See Cohen 1988, DeRose 1995, Lewis 1996, and the entry on   epistemic contextualism.