[Obi_Juan_Kenobi]

IQ is a perfectly valid population metric that correlates very strongly with many traits that we associate with general intelligence.

Unsurprisingly, a single metric does not encompass the entirety of human intelligence. Failure to identify a particular gifted individual does not in any way make it an invalid metric. It means that you don't understand what a population metric is and what it's useful for. To be fair, many people don't understand this and the layperson understanding of IQ isn't valid, but that has no bearing on the 'proper' IQ.

Generally, whenever considering methods addressing evolution or heritability, you cannot confuse individuals and populations.

[TheCoelacanth]

It's kind of like BMI. There are some outliers who are incorrectly classified as overweight due to being unusually muscular, but if the whole population's average BMI goes up, it's almost certainly because of people being fat.