(UNPUBLISHED/DRAFT) (with Vincent Hendricks)
For an agent to have some knowledge of some proposition, he or she must be able to eliminate all relevant possibilities of error. Furthermore, since Plato it has been assumed that knowledge is robust insofar as it does not vanish in the light of new evidence or information. So, if one ascribes knowledge to an agent, one is proposing, as Jaakko Hintikka puts it,
“…to disregard the possibility that further information would lead him to deny that p although he could perhaps imagine (logically possible) experiences which could do just that. [Hintikka 05]:18″