  The third prong of attack on contributory generalism involves asking for an appropriate epistemology. How are we to tell, from what we can discern case by case, that this feature will function in the same way wherever else it appears? Ross, our paradigm generalist, holds that we start with the recognition that this feature counts in favour here, but that we can immediately tell (by a process which he calls ‘intuitive induction’) that it must count in favour everywhere. The question is how this is supposed to work. What is it that is discernible in one case and tells us that what we have here must repeat in all other cases? (Ross rightly does not suppose that we learn our moral principles by ordinary induction.) The standard, and probably the only, answer to this question is wrong. This answer amounts to an account of what it is to make a difference in a particular case—what it is to be relevant here. That account understands a feature as relevant here if and only if, in any case where it is the only relevant feature, it would decide the issue. Now if this account of particular relevance were defensible, we would indeed have some reason to suppose that what is relevant here would be relevant in any other situation. For on each further situation it will still be true that if it were the only relevant feature, it would decide the issue. So relevance is indeed general relevance, on this showing. And this gives the generalist the epistemology he needs, for it is now easy to see how, in discerning that this feature matters here, we immediately see that it would make the same difference on every occurrence. For it is true of it on each occurrence that if it were the only relevant feature, it would decide the issue.