Those two assumptions are not particularly well-supported by data or modern thought on capabilities. Even the construct of "IQ" is probably a post-hoc explanati

Those two assumptions are not particularly well-supported by data or modern thought on capabilities. Even the construct of "IQ" is probably a post-hoc explanation of data rather than a predictive thing. If you want an hours-long discussion of that in the context of the book, The Bell Curve, have a look at: https://www.youtube.com/watch?v=UBc7qBS1Ujo https://www.youtube.com/watch?v=UBc7qBS1Ujo