Then the onus is on you to find and cite studies supporting whatever the hell your alternate hypothesis is or refuting his. Then have a polite debate about it.
HN is not the kind of place to resort to racebaiting and it's unacceptable and you know that.
I'm not going to waste my time and energy trying to refute someone who believes black people are not as clever as white people, and wraps it up in nice words. Go through his comments or any article on HN that mentions race. He tries to make the same point over and over again.
I'm not interested in any kind of debate about this. It just wastes my energy and brings me nothing. I will just point out that that's what he does when he chooses to do it. The onus is not on me to prove that black people are not dumb.
You still have yet to exhibit a post where I state the belief that "black people are not as clever as white people" or that "white people are not as clever as asians" [1]. (Note: I'm not asian. Am I racist against myself?)
You have, however, exhibited two posts where I explicitly state that I don't know the cause of the school performance gap and that cultural factors are one possible explanation. But I guess that those are part of my secret plan to appear non-racist, right?
Seriously dude, get a grip. There are far fewer secret racists out there than you think, and I'm basically the last person to be secretive about his views. If I thought blacks were, e.g., genetically less intelligent, I'd clearly state my hypothesis and link to data backing it up.
[1] Unless by "clever", you mean "do better in school". If that's what you mean, then I'm guilty as charged - just like PISA, TIMMS, the College Board, etc.
You are clearly someone who is obsessed with racial issues and in particular, issues that have some kind of data backing up what seems to be your theory that blacks are inferior to others. Sure, wrap it up in fancy round-about sentences and quotes from well known race-baiting sites, but do expect to be called out on it. Wrapping up racist statements in PC words doesn't make them any better.
I'm done with this argument, I don't think you deserve much more of my time.
HN is not the kind of place to resort to racebaiting and it's unacceptable and you know that.