I've seen the fall in arithmetical capabilities. But I've also seen that largely in myself. Oddly, I think credit cards and never having to make change for th

I've seen the fall in arithmetical capabilities. But I've also seen that largely in myself. Oddly, I think credit cards and never having to make change for things is a big driver in that. To wit, you get worse at the things you don't have to regularly do. Interesting point on the differences in the percentiles. I'd hazard that speaks more to exposure? Could be bias in what I was able to see, but I know every richer person I knew was able to get their kids in a private school, often with a personal tutor, during the '20 chaos. I should say, thanks for sticking on this thread! Interesting conversation.