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MrMind comments on Open thread, Sep. 21 - Sep. 27, 2015 - Less Wrong Discussion

3 Post author: MrMind 21 September 2015 07:19AM

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Comment author: MrMind 25 September 2015 09:56:02AM *  1 point [-]

I admit that I've tried to dig up why that site should matter on LW and came up empty handed. Like a gruesome car crash, from which you cannot avert your eyes, I've discovered these pearls:

"Racism is a wonderful institution that should be rejuvenated and inculcated in schools."
"Nothing is as damning to productivity as a visit from Rosie Palms and her five lovely sisters."
"Women generally either lack, or fail to develop, that ability [to think abstractly], so they don't think about right and wrong in the way men do." (guess who said this)

Comment author: VoiceOfRa 28 September 2015 11:05:35PM 2 points [-]

"Racism is a wonderful institution that should be rejuvenated and inculcated in schools."

Yes, having beliefs that correspond to reality and understanding Baysian priors and that it's not immoral to apply them to people should be more widely known.

Comment author: MrMind 29 September 2015 07:23:02AM *  1 point [-]

That's interesting. 'Racism' in my mind is a set of beliefs that is all but corresponded to reality. Which are the ones that comprise your definition?
Also 'apply them to people' hides some complexity: do you consider any decisions that comes from a prior on people to be moral?

Comment author: VoiceOfRa 29 September 2015 07:58:32AM 0 points [-]

Which are the ones that comprise your definition?

For example: blacks have lower IQ and a higher propensity to commit crimes than whites. Furthermore, there is good reason to believe that the cause of the difference is genetic.

Comment author: polymathwannabe 06 October 2015 03:14:01PM 0 points [-]

You'd need to compare populations of similar social status, income, and education for the difference to be meaningful.

Comment author: gwern 06 October 2015 03:50:19PM *  2 points [-]

No, you wouldn't, because intelligence is causally driving outcomes of social status, income, and education. (Think about what it would mean to compare two populations with different genetic potential but who still somehow wind up with identical income & education...) Like the fallacy of controlling for intermediate variables, controlling for outcomes is controlling away the effect. It would be like running a drug trial in which you controlled for deaths.

If you are, for some improbable reason, deeply concerned that your genetic correlates are some sort of very subtle population stratification that your PCA missed, you can check using a within-family design, which by construction keeps many variables constant without illicitly controlling for outcome variables; and we already know that the IQ hits survive this test because Rietveld et al 2013 checked the original hits ("The polygenic score remains associated with educational attainment and cognitive function in within-family analyses (table S25)"), "Polygenic Influence on Educational Attainment: New Evidence From the National Longitudinal Study of Adolescent to Adult Health" Domingue et al 2015 replicated it in the USA, and the still-upcoming SSGAC paper also finds no residual confounding.

Comment author: polymathwannabe 06 October 2015 04:15:10PM 0 points [-]

How do you handle a scenario where the causal arrow goes both ways, i.e. intelligence drives employability and wealth, while nutrition and prenatal care drive intelligence?

Comment author: gwern 06 October 2015 07:34:25PM *  2 points [-]

You might handle it with a longitudinal SEM or causal net since you have time separating effects (parental intelligence comes before wealth which comes before nutrition/prenatal-care which comes before childrens' intelligence); but for that specific case, nutrition & prenatal care are already largely ruled out as causally relevant since they fall under 'shared environment', which for IQ in the West is very low.

Comment author: entirelyuseless 29 September 2015 01:22:48PM 0 points [-]

Yes, many decisions that come from a prior on people are moral. For example, if you see someone charging you with a knife, it is moral to evade, based on the prior that many people charging you with a knife are going to harm you.