  The trouble is that folk morality is pervasively contested. There’s a lot of agreement, to be sure: we’d all be talking past each other were there not (Jackson 1998, 132). But what’s left when you leave the contested stuff out plausibly won’t furnish enough determinate content to make the uniqueness clause we added at FM3 come out true. So what Jackson proposes is that, instead of taking the input to this analytic procedure to be folk morality in its current state, we should take it to be what he calls “mature folk morality”, where this designates what folk morality will have evolved into when critical reflection has done all it can to sharpen it up.