I wouldn't say they're fictions anymore than I would say gravity is fiction. They're models, so by definition they don't fully encompass that which they're mean

I wouldn't say they're fictions anymore than I would say gravity is fiction. They're models, so by definition they don't fully encompass that which they're meant to represent. I think IQ has some usefulness, e.g. https://en.wikipedia.org/wiki/Intelligence_quotient#Job_performance https://en.wikipedia.org/wiki/Intelligence_quotient#Job_perf... Race, well maybe, the political climate is usually too hot to entertain a rational discussion of that.