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@tillshadeisgone

Is that a bird? For a moment I confused it with a thumbs-up.

You run the test on a bunch of white people with shared cultural history and get a /distribution/. Are people with IQ 70 as capable as people with IQ 130? No. But I'm required to compare individuals from the same population as created the distribution to get a valid result.

Does IQ measure anything? Well Yes It Does. What it does and doesn't do well is discussed in however many books, but saying "it's /only/ inaccurate" is just as silly as saying that average human height is not in fact normally distributed, or arguing that the normal curve shouldn't be used to discuss height "because it's not reliable". Treating it as /deterministic/ is a mistake, but it IS "advisory".