While I get where you're coming from, I don't think you've come very far. IQ is not meaningless as a predictor at all - it correlates with income, and income co

While I get where you're coming from, I don't think you've come very far. IQ is not meaningless as a predictor at all - it correlates with income, and income correlates with some measures of impact. Stating that the rate of IQ change is associated with the measured IQ is very relevant to the topic of brain functions and age, though not directly to improvement with age. That said, I too found the aside on Flynn's reputation to be distracting.