 In part the trouble here arises from tacit preconceptions concerning the nature of justification. If we attempt to justify continued friendship in terms of the friend’s being this particular person, with a particular historical relationship to me, then it seems like we are appealing to merely idiosyncratic and subjective properties, which might explain but cannot justify that friendship. This seems to imply that justification in general requires the appeal to the friend’s being a type of person, having general, objective properties that others might share; this leads to the problem of fungibility. Solving the problem, it might therefore seem, requires somehow overcoming this preconception concerning justification—a task which no one has attempted in the literature on friendship.