> A brief example: if I'm a shaman in a nonindustrial society,
> and I'm trying to exorcise a malign spirit, what good is your
> formal logic? It's completely irrelevant to my social
> reality as a shaman; in fact, thinking that way would
> get in the way of my exorcism!
I think this rests on what your definition of "good" is.
(Shamans? Why not invoke Inquisitors?)