There is huge difference between saying 1. Smart parents -> Give their kids more exposure -> More Exposure and guidance make the kids smart 2. Smart parents -

There is huge difference between saying 1. Smart parents -> Give their kids more exposure -> More Exposure and guidance make the kids smart 2. Smart parents -> kids inherit their smartness. Greg was talking about genes , or case 2, and not case 1. which is what I think is unsubstantiated.