The distribution of an individual's IQ (as a quantile in the group's aggregate, normalized IQ distribution) is not a dirac delta. It's not constant over a lifes

The distribution of an individual's IQ (as a quantile in the group's aggregate, normalized IQ distribution) is not a dirac delta. It's not constant over a lifespan at one location. I think there would be significant noticeable losses in IQ due to social factors, too, and to a much greater extent than most people would appear to believe when they talk about the heredity of IQ but then think that means IQ determinism.. For example someone could test at 115 IQ, become homeless, then have something much closer to ~100. (Do not use "but someone that smart would never become..." as a cop-out..)