Comment by UpsideDownRide

And what exactly is intelligence. Because there are many aspects to usual understanding of it and ability in each of them can vary quite a bit, even though there is some transfer (and it even has a name).

And then the issue of innateness, there is so much interplay with education both formal and informal, socioeconomic status, diet, emotional state, and myriad other things that it turns out pretty quickly that it's hard to say how kuch each part contributes.

It gets pretty murky fast once you start being careful when reasoning about this.