I think that estimating about non-peers is most dangerous. How smart/dumb is the guy who fixes your car? Or the lady who owns a flower shop?
I think it's quite a stretch to assume too much about intelligence simply on the basis of vocation, etc. And the tests that Hanson cites are highly based on reading comprehension (a skill not needed in many vocations)... the seeming logic problems are all simple enough to be understood by a chimp, so if humans miss them it's probably due to some other factor.
I think it's quite a stretch to assume too much about intelligence simply on the basis of vocation, etc. And the tests that Hanson cites are highly based on reading comprehension (a skill not needed in many vocations)... the seeming logic problems are all simple enough to be understood by a chimp, so if humans miss them it's probably due to some other factor.