This post is a reply to [friend of the blog](/tag/ozy/) Ozymandias's [reply](TODO: linky) to [my reply](/2018/Feb/the-categories-were-made-for-man-to-make-predictions/) to Scott Alexander's ["The Categories Were Made for Man, Not Man for the Categories"](http://slatestarcodex.com/2014/11/21/the-categories-were-made-for-man-not-man-for-the-categories/).
+After summarizing the discussion so far, Ozy
+
> Saotome-Westlake argues for the existence of a third definition, based on psychology. He argues that (some) trans people are psychologically different from cisgender members of their identified genders: if you graph, say, how likely cisgender women are to be members of the rationalist community, and how likely transgender women are to be members of the rationalist community, these charts will not look very much like each other at all. Therefore, it makes sense to consider trans people to be members of their assigned gender at birth for some purposes.
[gut take, not sure where/how it belongs in the post: I have misgivings about this, because I'm not a _fan_ of psychological sexual dimorphism and it feels weird to be painted as a defender of it. But, but—if the difference is still going to _be there_ no matter how I feel about it, then that's _worth noticing_]
-> Conversely, as far as I can tell, there has yet to be a single transgender NFL football player, while statistically there ought to be five currently playing.
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-A side note, but—this doesn't actually seem hard to explain. If the ought-to-be-five means MtFs, well, you _can't_ transition MtF and _stay_ in the NFL—HRT is going to kill your performance. Even if you think the effect size of hormones is overhyped, this is a _very_ competitive area, you can't say, "Oh, it only affected performance like ten percent, that's nothing—ten percent is _huge_." This doesn't rule out Jenner-class eggs in the NFL.
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-And if it means FtMs, well, people get into football as teenagers: there are going to be structural reasons making that difficult even if gynephilic FtMs _are_ the sort of people who would like to play (difficulty of transitioning _that_ early _and_ being stealthy about it, and difficulty of being accepted as one of the guys if you're not stealthy—let alone NFL/NCAA policy about steroid use, if the matter has even come up, which is probably hasn't)
> So by Saotome-Westlake’s argument, any group of women whose interests and personality traits, on average, observably differ from that of women as a whole ought to be classified as not actually women at all.
>
[...]
-> If the Cohen’s d effect size is 1 (commonly glossed as “large”), a full 24% of women will have less psychological femaleness than the average man, which means that 98.67% of your problem is a cisgender female problem.
+> If the Cohen's d effect size is 1 (commonly glossed as "large"), a full 24% of women will have less psychological femaleness than the average man, which means that 98.67% of your problem is a cisgender female problem.
[I _wish_ it were _d_=1! link the research on multivariate differences and how it might actually be d=2.7]
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