-[vertical pleiotropy: LDL affects heart attack; vs. horizontal]
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-["tag" SNP: https://www.gwern.net/Embryo-selection#limits-to-iterated-selection-the-paradox-of-polygenicity ]
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-[Plomin school vs. Turkheimer school debate on the usefulness of polygenic scores]
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-[Plomin says, causal in one direction (trait can't cause score), predict from brith, predict individuals. Can assess risk before it happens, clinical psychology will move towards dimensions rather than diagnoses, "positive genomics"—looking at the right tail in contrast to clinical psychology's focus on disorders]
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-[Eric Turkheimer: polygenic scores don't tell you anything about causality, and science is about causes: heritability without mechanism. Divorce is heritable _in the same way_ that IQ is. http://www.geneticshumanagency.org/gha/the-ubiquity-problem-for-group-differences-in-behavior/ a "universal, nonspecific genetic pull on everything"]
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-[Murray says social science is about explaining variance, not causality]
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-There are also some appendicies at the back of the book! Appendix 1 (reproduced from one of Murray's earlier books) explains some basic statistics concepts. Appendix 2 ("Sexual Dimorphism in Humans") goes over the prevalence of intersex conditions and gays, and then—so much for this post broadening the [topic scope of this blog](/tag/two-type-taxonomy/)—transgender typology! Murray presents the Blanchard–Bailey–Lawrence–Littman view as fact, which I think is basically _correct_, but a more comprehensive treatment (which I concede may be too much too hope for from a mere Appendix) would have at least _mentioned_ alternative views ([Serano](http://www.juliaserano.com/)? [Veale](https://www.waikato.ac.nz/fass/about/staff/jveale)?), if only to explain _why_ they're worth dismissing. (Contrast to the eight pages in the main text explaining why "But, but, epigenetics!" is worth dismissing.)
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-Then Appendix 3 ("Sex Differences in Brain Volumes and Variance") has tables of brain-size data, and an explanation of the greater-male-variance hypothesis. Cool!
+There are also some appendicies at the back of the book! Appendix 1 (reproduced from, um, one of Murray's earlier books with a coauthor) explains some basic statistics concepts. Appendix 2 ("Sexual Dimorphism in Humans") goes over the prevalence of intersex conditions and gays, and then—so much for this post broadening the [topic scope of this blog](/tag/two-type-taxonomy/)—transgender typology! Murray presents the Blanchard–Bailey–Lawrence–Littman view as fact, which I think is basically _correct_, but a more comprehensive treatment (which I concede may be too much too hope for from a mere Appendix) would have at least _mentioned_ alternative views ([Serano](https://rationalwiki.org/wiki/Intrinsic_Inclinations_Model)? [Veale](/papers/veale-lomax-clarke-identity_defense_model.pdf)?), if only to explain _why_ they're worth dismissing. (Contrast to the eight pages in the main text explaining why "But, but, epigenetics!" is worth dismissing.) Then Appendix 3 ("Sex Differences in Brain Volumes and Variance") has tables of brain-size data, and an explanation of the greater-male-variance hypothesis. Cool!