Many physical traits are simple, like blue and brown eye color. Others are not, and are just a suppression of some DNA inheritance to magnify other DNA traits. In that case, the trait is never lost and surfaces again when needed. Intelligence only has an inheritance factor. It is comprised of a variety and combination of things. No, intelligence is not consistent across time, geography, environment, socio-economic, education, etc. Not at all, and I just showed you studies that proved it is not. Jews historically took studying very seriously, btw, so no surprise there. Studying more in a supportive environment will get a person better grades and better scores on IQ tests. Anyway, it's clear we're going to disagree on this. Thank you for the debate, anyway.