ABSTRACT
Defeasibility limits undercover facts to facts of which it is realistic to ask both teachers and students to be aware. Which facts are like that? One possibility is that this question should be answered in social terms. They are aware of that general failure, too. It is part of their evidence for thinking there is no Loch Ness Monster. Seemingly, then, their belief that there is no Loch Ness Monster satisfies social defeasibility (SD). Their belief is true and justified, and there are no facts that would disturb their justification if they were aware of them, and of which other people around them are aware. If the dog-in-sheep's-clothing case is a problem for SD, is this because SD does not recognize that even a majority of people can be Gettiered by a given situation? There could be hundreds of people standing with them, surveying that field, none of them aware of UF.
