Ask a public-health/nutrition student

[Aractus]

@What-
Well as I pointed out, Helfgott doesn't play the piano like other professional pianists, however he can entertain an audience when he plays and that itself is a skill (showing his creativity), and he made a successful career out of it.

Let's give another example in the real world: education. A person's education level could be said to be a determinant of their adult intelligence. That's their actual intelligence mind you, not their capacity for intelligence. The Commonwealth Government now views Certificate III as the vocational equivalent to a Year 12 certificate (see AIHW 2015 & COAG 2013).

There are different psychological models of intelligence. All of them are multi-faceted, if that makes sense. There isn't, to my knowledge anyway, serious belief that intelligence is monolithic.

Yeah, I think in general the idea of IQ is at least parly busted.  It is meant to represent a general intelligence, which means if you study one or two intellectual tasks, you should be able to assume that ALL intellectual tasts will correlate reasonably well-- which they do, but not enough to establish a useful measure of the mental greatness of an individual.

Define "general intelligence". IQ has another weakness - it compares you to other contemporary people. If you compared the IQ's of people the same age 30 or 40 years ago, on average they'd be significantly lower (from memory something like 10-20 points lower!): does that mean people 30-40 years ago had lower intelligence? Or that they learned less? How do you account for such a discrepancy?