I guess it's useful if your goal is to figure out how to divide kids into separate math classes. I don't think anyone intended ability to rotate blocks and scramble letters as a timeless gauge of the quality of a person.
Don’t conflate intelligence with quality or value. Every human being is inherently valuable independent of their intelligence, and there are plenty of other interesting features besides intelligence that make people unique and interesting. Believing that IQ measures something tangible is not equivalent to ranking people based on their value any more than believing height or weight measure something real.
Yeah sorry, I agree with you in spirit. I was mainly arguing against the idea that "IQ is useful" and "IQ measures the value of humans" have to either both be true or both be false. My reply is to the interpretation of your comment as "IQ doesn't and can't measure the value of humans, therefor it's not very useful," which might not have been your intent.
