@makeworld @viraptor @aimaz @bontchev and if that's not sufficient to convince you, then how about the Flynn effect? When modern children take the old versions of the test the average scores are significantly above 100 (which is meant to be the baseline average).
An actual robust measurement of intelligence doesn't produce wildly different results by generation. IQ is just astrology for well educated white people. See also Myers-Briggs.
@makeworld @viraptor @aimaz @bontchev or, to put it another way, if you were to attempt to devise a genuinely objective assessment for cognitive ability today then what you would end up with would look absolutely nothing like an IQ test.
The usage of IQ is just a textbook case of academic regurgitation of past assumptions, without critical analysis, based purely on appeals to historic authority. See also the theories of Sigmund Freud, which were regurgitated long after they'd been debunked.