  Sadly, the account of relevance that this all depends on is not defensible. It is, after all, true of any feature whatever that if it were the only relevant feature, it would decide the issue. The word ‘relevant’ appears within this formulation, and it cannot be removed.  For if we said merely that if this feature were the only feature, it would decide the issue, we would have said something that is probably both false and, worse, incoherent. It would be incoherent because the idea that a feature could be present alone, without any other features whatever, is surely nonsense. The idea that an action could be merely kind, say, without having any other features at all, makes no sense at all. Further, there may be some features that can only be relevant if some other feature is also relevant—features that (in terms of reasons) only give us reasons if some other feature is giving us reasons as well. For instance, in the Prisoner’s Dilemma one prisoner only has reasons if the other one does. If this can occur, any ‘isolation test’ for reasons must miss some reasons out. Finally, trying to isolate the contribution of a feature by asking how things would have been if no other feature had made any contribution is, when one comes to think of it, a rather peculiar enterprise. It is uncomfortably like trying to determine the contribution made by one football player to his team’s success today by asking how things would have been if there had been no other players on the field. So the notion of relevance that is required as a basis for generalist epistemology is unacceptable.