I don't know what you think that means, but if you took "peer reviewed evidence" from the 1990s as scientific truth, you'd arrive at an answer that is outside the mainstream of even hereditarian scientists today. Further, things like twin studies can't be evidence of genetic causation. I gave an example of why not upthread.

I think we are way too deep in the weeds for this to be productive, and we're the only two people reading this. If it wasn't clear, I was trying 1-2 exchanges ago to find an off-ramp for this. I'm not telling you what to believe, I'm just saying that twin study heritability statistics don't settle the question. We should be able to agree comfortably there.