Like IQ correlates with income or happiness or really anything only on the bottom-half of the distribution, and only really when you start getting really low numbers.
Like I said, for certain very technical applications in medicine, psychiatry, education, criminal law etc it is useful, but that is highly circumscribed and very narrowly applied. As a gneral *concept* for society at large it's fucking less than useless, it's dangerous.
There's two major problems that the IQ obsessed gloss over - first, that it is some immutable personal quality. It is not. You will get a different number every time. Particularly because the harder questions are very stochastic.
It depends on the test too. The questions, setting etc ....measuring IQ presumes the questions actually are capable of generating results which can give have actually measured *intelligence*.
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