[hntrader]

Correct.

I was asking what the basis is for your confidence that it positively isn't substantially genetic.

We know that intelligence is highly heritable, which leaves a few possible explanations, genetics being one of them (along with prenatal nutrition, prenatal lead exposure, etc).

If you're going to claim that genetics is only a small part of the reason that it's heritable, then that has its own burden of proof that needs to be met.