Was my point really that hard to follow? I'm not saying "intelligence" in the strict psychological definition of the word. I mean, perhaps, the thing they claim was the independent variable was in fact a proxy for something else I hypothecated as "intelligence", by which I really meant some as yet undefined thing that on average leads to higher incomes, which could be intelligence in the colloquial sense, because that sort of has that trait and is pretty influential in attractiveness.