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I am not aware of any epistemic rules which say that you can't use moral judgements to decide whether something is silly or ugly.
I agree that they are heritable. Turkheimer also agrees that they are heritable.
I didn't interpret Turkheimer as judging it ugly rather than true on moral grounds, I interpreted him as judging it ugly rather than silly or unobjectionable on moral grounds.
I think you'd get more useful engagement and replies if, instead of saying 'phenotypic null hypothesis' a lot and explaining the theory of what it means, you tried to explain in a 'teaching' type way how and why it matters - like, laid out a few toy examples of populations that seem to be HBD-ish if you don't account for PNH but PNH means that heritability is explained by underlying mechanisms that are less HBD-ish.
It's not perfect that interlocutors aren't doing that work themselves, but - I spent an hour yesterday diving deep into something I disagreed with, made a long post here, came out understanding it a bit better but nothing really conclusive, and got zero replies. I could do that again, sure, but I have other stuff to do, so maybe later! People do that a lot here, but it takes enough time they won't do it every time.
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"because it is a matter of ethical principle that individual and cultural accomplishment is not tied to the genes in the same way as the appearance of our hair"
What do you make of that then? Suppose the Catholic Church said "it is a matter of ethnical principle that the sun revolves around the Earth." No further arguments they made for geocentrism would be epistemically interesting. We shouldn't trust anything they say on the topic. Once someone confesses to being uninterested in the pursuit of truth, indeed to being the enemy of the truth conditional on its content, it's folly to engage with them for the purpose of pursuing the truth.
In sum: Turkheimer is a propagandist on this topic, he admitted as much, and it's a waste of time to engage with his arguments on the topic if you have any interest in finding the truth.
I have already read his point about the phenotypic null hypothesis, so your argument can't exactly persuade me to un-read it, whatever that would mean. And having read it, I've come to the conclusion that it's a critically important point for understanding heritability. Reading his paper and understanding his argument screens off whichever virtue or vice he might have.
Reading and understanding these arguments takes significant investment. So we need to use some manner of rational principle to decide which arguments are worth the investment to understand and engage with. That the argument is endorsed by Eric Turkheimer (a confessed propagandist) and @tailcalled (from my perspective, a random and unknown internet person who describes him or herself on Twitter as an autistic hobbyist gender researcher) does not come close to surmounting the threshold of reputability that it would take to persuade me to engage with it.
Just as physicists are loathe to engage with (and likely debunk) random cranks who come bearing plans for perpetual motion machines, and number theorists are loathe to engage with (and likely debunk) random cranks who come bearing new schemes for cryptography, no one should feel compelled to spend the investment that it takes to engage with (and likely debunk) whatever latest wad of argumentative complexity Turkheimer has concocted to further his political end. The fact that you personally vouch for it means nothing to me.
One productive step you could take if you want people to engage with the argument is to do the work of simplifying the argument to the point where it doesn't take significant investment to understand it. Boil it down to a couple of sentences with a simple toy model, and explain how it analogizes back to the original claim. But your whole method of repeatedly posting to the front page "here's a link to a paper from a confessed liar, go do a ton of homework to understand it if you want to consider yourself rational" is just one iteration of a gish gallop.
What's wrong with the toy model I gave in my article, of education? That genes affect intelligence which affect exam completion which affect education?
Paste in the specific couple of sentences that summarize the view and I'll take a look.
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This is exactly the conclusion I came to as well. tailcalled seems more interested in obfuscating and claiming we can't know anything than clarifying and getting closer to the truth (despite occasional protestations of the opposite).
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