-I would bet at very generous odds at some point in his four decades on Earth, Eliezer Yudkowsky has used _she_ or _he_ on the basis of perceived sex to refer to someone whose name he didn't know. Because _all native English speakers do this_. Moreover, we can say something about the [cognitive algorithm](https://www.lesswrong.com/posts/HcCpvYLoSFP4iAqSz/rationality-appreciating-cognitive-algorithms) underlying _how_ they do this: [people can recognize sex from facial photos _alone_ (hair covered, males clean-shaven) at 96% accuracy](/papers/bruce_et_al-sex_discrimination_how_do_we_tell.pdf). In naturalistic settings where we can see and hear more [secondary sex characteristics](https://en.wikipedia.org/wiki/Secondary_sex_characteristic) than just someone's face, accuracy would be even greater. It's not a mystery why people can get sex-based pronouns "right" the vast majority of the time without having to be told or remember specific people's pronouns.
+I would bet at very generous odds at some point in his four decades on Earth, Eliezer Yudkowsky has used _she_ or _he_ on the basis of perceived sex to refer to someone whose name he didn't know. Because _all native English speakers do this_. Moreover, we can say something about the [cognitive algorithm](https://www.lesswrong.com/posts/HcCpvYLoSFP4iAqSz/rationality-appreciating-cognitive-algorithms) underlying _how_ they do this: [people can recognize sex from facial photos _alone_ (hair covered, males clean-shaven) at 96% accuracy](/papers/bruce_et_al-sex_discrimination_how_do_we_tell.pdf). In naturalistic settings where we can see and hear more [secondary sex characteristics](https://en.wikipedia.org/wiki/Secondary_sex_characteristic#In_humans) than just someone's face (voice, build, height, breasts, [gait](https://sillyolme.wordpress.com/2010/09/24/all-the-wrong-moves/), _&c_.), accuracy would be even greater. It's not a mystery why people can get sex-based pronouns "right" the vast majority of the time without having to be told or remember specific people's pronouns.
+
+Conversely, I would also bet at very generous odds that in his four decades on Earth, Eliezer Yudkowsky has very rarely if ever assumed what someone's name is on the basis of their appearance without being told. Because _no native English speakers do this_ (seriously, rather than as a joke or a troll). If you doubt this, try to explain what algorithm you would use to infer that someone's name is "Oliver" based on how they look. What are the "secondary Oliver characteristics", specifically? People for whom it was _actually true_ that names map to appearances the way pronouns map to sex, should not have trouble answering this question!
+
+If there _were_ a substantial contingent of native English speakers who don't interpret pronouns as conveying sex category information, one would expect this to show up in our cultural corpus more often—and yet, I'm actually not aware of any notable examples of this (if you do, let me know in the comments). In contrast, it's very easy to find instances of speakers treating pronouns and sex as synonymous. As an arbitrarily chosen example, in [one episode](https://theamazingworldofgumball.fandom.com/wiki/The_Nest) of the animated series [_The Amazing World of Gumball_](https://tvtropes.org/pmwiki/pmwiki.php/WesternAnimation/TheAmazingWorldOfGumball) featuring the ravenous spawn of our protagonists' evil pet turtle, the anthropomorphic-rabbit [Bumbling Dad](https://tvtropes.org/pmwiki/pmwiki.php/Main/BumblingDad) character [says, "Who's to say this pregnant turtle is a _her_?" and everyone gives him a look](https://www.youtube.com/watch?v=5N2Msnrq7wU&t=14s).
+
+The joke, you see, is that bunny-father is unthinkingly applying the stock question "Who's to say _X_ is a he/she?" (which makes sense when _X_ is, _e.g._, "the nurse") in a context where there's an obvious answer—namely, that the referents of "her" pronouns are female and only females get pregnant—but the character is too stupid to notice this, and we enjoy a laugh at his expense.