-Psychology is a complicated empirical science: no matter how "obvious" I might think something is, I have to admit that I could be wrong—[not just as an obligatory profession of humility, but _actually_ wrong in the real world](https://www.lesswrong.com/posts/GrDqnMjhqoxiqpQPw/the-proper-use-of-humility). If my fellow rationalists weren't sold on the two-types thing, I might be _disappointed_, [...]
+Psychology is a complicated empirical science: no matter how "obvious" I might think something is, I have to admit that I could be wrong—[not just as an obligatory profession of humility, but _actually_ wrong in the real world](https://www.lesswrong.com/posts/GrDqnMjhqoxiqpQPw/the-proper-use-of-humility). If my fellow rationalists weren't sold on the autogynephilia and transgender thing, I might be a bit disappointed, but it's definitely not grounds to denounce the entire community as a failure or a fraud.
+
+But this "I can define the word _woman_ any way I want" mind game? _That_ part was _absolutely_ clear-cut. That part of the argument, I knew I could win.
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+To be clear, it's _true_ that categories exist in our model of the world, rather than the world itself—the "map", not the "territory"—and it's true that trans women might be women _with respect to_ some genuinely useful definition of the word "woman." However, the Scott Alexander piece that people kept linking to me goes further, claiming that we can redefine gender categories _in order to make trans people feel better_:
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+> I ought to accept an unexpected man or two deep inside the conceptual boundaries of what would normally be considered female if it'll save someone's life. There's no rule of rationality saying that I shouldn't, and there are plenty of rules of human decency saying that I should.
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+But this is just wrong. Categories exist in our model of the world _in order to_ capture empirical regularities in the world itself: the map is supposed to _reflect_ the territory, and there _are_ "rules of rationality" governing what kinds of word and category usages correspond to correct probabilistic inferences. [We had a whole Sequence about this](https://www.lesswrong.com/posts/FaJaCgqBKphrDzDSj/37-ways-that-words-can-be-wrong) back in 'aught-eight. Alexander cites [a post](https://www.lesswrong.com/posts/yA4gF5KrboK2m2Xu7/how-an-algorithm-feels-from-inside) from that Sequence in support of the (true) point about how categories are "in the map" ... but if you actually read the Sequence, another point that Yudkowsky pounds home _over and over and over again_, is that word and category definitions are nevertheless _not_ arbitrary, because there are criteria that make some definitions _perform better_ than others as "cognitive technology"—
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+> ["It is a common misconception that you can define a word any way you like. [...] If you believe that you can 'define a word any way you like', without realizing that your brain goes on categorizing without your conscious oversight, then you won't take the effort to choose your definitions wisely."](https://www.lesswrong.com/posts/3nxs2WYDGzJbzcLMp/words-as-hidden-inferences)
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+> ["So that's another reason you can't 'define a word any way you like': You can't directly program concepts into someone else's brain."](https://www.lesswrong.com/posts/HsznWM9A7NiuGsp28/extensions-and-intensions)
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+> ["When you take into account the way the human mind actually, pragmatically works, the notion 'I can define a word any way I like' soon becomes 'I can believe anything I want about a fixed set of objects' or 'I can move any object I want in or out of a fixed membership test'."](https://www.lesswrong.com/posts/HsznWM9A7NiuGsp28/extensions-and-intensions)