Predict intelligence or predict IQ scores?
This one seems to do some weird combination of that, plus several smaller datasets which have some kind of test score, all combined & normalized somehow. (Presumably they had some fun conversations with their referees about the statistics...)
Intelligence is such an amorphous concept in our society.
Intelligence is a similarly high level word that just encompasses too many things.
Critical thinking and problem solving, for me, fit your criteria. Are these nature or nurture?
And what of drive and ambition?
There are plenty of really smart people on the dole, yes? But they're probably just in the wrong place at the wrong time. How is an advantage an advantage if you're a genius ice sculpturer in say FL? :) Is that not a case of it being relative?