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There was the book, "The Bell Curve" that was mentioned in the article.
Apparently, there is some evidence to support his assertions in that.
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Sure. IQ tests are perfect at measuring "intelligence".
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Similarly, in "Science" in the service of Racism C. Loring Brace writes that The Bell Curve makes six basic assumptions at the beginning of the book:
1. Human Cognitive ability is a single general entity, depictable as a single number.
2. Cognitive ability has a heritability of between 40 and 80 percent and is therefore primarily genetically based.
3. IQ is essentially immutable, fixed over the course of a life span.
4. IQ tests measure how "smart" or "intelligent" people are and are capable of rank ordering people in a linear order.
5. IQ tests can measure this accurately.
6. IQ tests are not biased with regard to race ethnic group or socioeconomic status.
Brace proceeds to argue that there are faults in every one of these assumptions.
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