+> 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.
+
+This is wrong because 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. [Yudkowsky wrote a whole Sequence about this](https://www.lesswrong.com/s/SGB7Y5WERh4skwtnb) back in 'aught-eight, as part of the original Sequences. 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: you can't define a word any way you want, because there are [at least 37 ways that words can be wrong](https://www.lesswrong.com/posts/FaJaCgqBKphrDzDSj/37-ways-that-words-can-be-wrong)—principles that make some definitions _perform better_ than others as "cognitive technology."
+
+In the case of Alexander's bogus argument about gender categories, the relevant principle ([#30](https://www.lesswrong.com/posts/d5NyJ2Lf6N22AD9PB/where-to-draw-the-boundary) on [the list of 37](https://www.lesswrong.com/posts/FaJaCgqBKphrDzDSj/37-ways-that-words-can-be-wrong)) is that if you group things together in your map that aren't actually similar in the territory, you're going to confuse yourself.
+
+Importantly, this is a very general point about how language itself works _that has nothing to do with gender_. No matter what you believe about politically-controversial empirical questions, intellectually honest people should be able to agree that "I ought to accept an unexpected [X] or two deep inside the conceptual boundaries of what would normally be considered [Y] if [positive consequence]" is not the correct philosophy of language, _independently of the particular values of X and Y_.
+
+Also, this ... really wasn't what I was trying to talk about. _I_ thought I was trying to talk about autogynephilia as an _empirical_ theory of psychology of late-onset gender dysphoria in males, the truth or falsity of which obviously cannot be altered by changing the meanings of words. But at this point, I still trusted people in my robot cult to be basically intellectually honest, rather than messing with me because of their political incentives, so I endeavored to respond to the category-boundary argument under the assumption that it was an intellectually serious argument that someone could honestly be confused about.
+
+When I took a year off from dayjobbing from March 2017 to March 2018 in order to have more time to study and work on this blog, the capstone of my sabbatical was an exhaustive response to Alexander, ["The Categories Were Made for Man to Make Predictions"](/2018/Feb/the-categories-were-made-for-man-to-make-predictions/) (which Alexander [graciously included in his next links post](https://archive.ph/irpfd#selection-1625.53-1629.55)). A few months later, I followed it up with ["Reply to _The Unit of Caring_ on Adult Human Females"](/2018/Apr/reply-to-the-unit-of-caring-on-adult-human-females/), responding to a similar argument from soon-to-be-_Vox_-journalist Kelsey Piper, then writing as _The Unit of Caring_ on Tumblr.
+
+I'm proud of those posts: I think Alexander's and Piper's arguments were incredibly dumb, and with a lot of effort, I think I did a pretty good job of explaining exactly why to anyone who was interested and didn't, at some level, prefer not to understand.
+
+Of course, a pretty good job of explaining by one niche blogger wasn't going to put much of a dent in the culture, which is the sum of everyone's blogposts; despite the mild boost from the _Slate Star Codex_ links post, my megaphone just wasn't very big. At this point, I was _disappointed_ with the limited impact of my work, but not to the point of bearing much hostility to "the community". People had made their arguments, and I had made mine; I didn't think I was _entitled_ to anything more than that.
+
+... and, really, that _should_ have been the end of the story. Not much of a story at all. If I hadn't been further provoked, I would have still kept up this blog, and I still would have ended up arguing about gender with people occasionally, but this personal obsession of mine wouldn't have been the occasion of a full-on robot-cult religious civil war involving other people who you'd expect to have much more important things to do with their time.
+
+The _causis belli_ for the religious civil war happened on 28 November 2018. I was at my new dayjob's company offsite event in Austin. Coincidentally, I had already spent much of the previous two days (since just before the plane to Austin took off) arguing trans issues with other "rationalists" on Discord.
+
+Just that month, I had started a Twitter account in my own name, inspired in an odd way by the suffocating [wokeness of the open-source software scene](/2018/Oct/sticker-prices/) where I [occasionally contributed diagnostics patches to the compiler](https://github.com/rust-lang/rust/commits?author=zackmdavis). My secret plan/fantasy was to get more famous and established in the that world (one of compiler team membership, or conference talk accepted, preferably both), get some corresponding Twitter followers, and _then_ bust out the [@BlanchardPhd](https://twitter.com/BlanchardPhD) retweets and links to this blog. In the median case, absolutely nothing would happen (probably because I failed at being famous), but I saw an interesting tail of scenarios in which I'd get to be a test case in [the Code of Conduct wars](https://techcrunch.com/2016/03/05/how-we-may-mesh/).
+
+So, now having a Twitter account, I was browsing Twitter in the bedroom at the rental house for the dayjob retreat, when I happened to come across [this thread by @ESYudkowsky](https://twitter.com/ESYudkowsky/status/1067183500216811521):
+
+> Some people I usually respect for their willingness to publicly die on a hill of facts, now seem to be talking as if pronouns are facts, or as if who uses what bathroom is necessarily a factual statement about chromosomes. Come on, you know the distinction better than that!
+>
+> _Even if_ somebody went around saying, "I demand you call me 'she' and furthermore I claim to have two X chromosomes!", which none of my trans colleagues have ever said to me by the way, it still isn't a question-of-empirical-fact whether she should be called "she". It's an act.
+>
+> In saying this, I am not taking a stand for or against any Twitter policies. I am making a stand on a hill of meaning in defense of validity, about the distinction between what is and isn't a stand on a hill of facts in defense of truth.
+>
+> I will never stand against those who stand against lies. But changing your name, asking people to address you by a different pronoun, and getting sex reassignment surgery, Is. Not. Lying. You are _ontologically_ confused if you think those acts are false assertions.
+
+Some of the replies tried explain the problem—and [Yudkowsky kept refusing to understand](https://twitter.com/ESYudkowsky/status/1067291243728650243)—
+
+> Using language in a way _you_ dislike, openly and explicitly and with public focus on the language and its meaning, is not lying. The proposition you claim false (chromosomes?) is not what the speech is meant to convey—and this is known to everyone involved, it is not a secret.
+>
+> Now, maybe as a matter of policy, you want to make a case for language being used a certain way. Well, that's a separate debate then. But you're not making a stand for Truth in doing so, and your opponents aren't tricking anyone or trying to.
+
+—[repeatedly](https://twitter.com/ESYudkowsky/status/1067198993485058048):
+
+> You're mistaken about what the word means to you, I demonstrate thus: https://en.wikipedia.org/wiki/XX_male_syndrome
+>
+> But even ignoring that, you're not standing in defense of truth if you insist on a word, brought explicitly into question, being used with some particular meaning.
+
+Dear reader, this is the moment where I _flipped out_. Let me explain.
+
+This "hill of meaning in defense of validity" proclamation was just such a striking contrast to the Eliezer Yudkowsky I remembered—the Eliezer Yudkowsky whom I had variously described as having "taught me everything I know" and "rewritten my personality over the internet"—who didn't hesitate to criticize uses of language that he thought were failing to carve reality at the joints, even going so far as to [call them "wrong"](https://www.lesswrong.com/posts/FaJaCgqBKphrDzDSj/37-ways-that-words-can-be-wrong):
+
+> [S]aying "There's no way my choice of X can be 'wrong'" is nearly always an error in practice, whatever the theory. You can always be wrong. Even when it's theoretically impossible to be wrong, you can still be wrong. There is never a Get-Out-Of-Jail-Free card for anything you do. That's life.
+
+[Similarly](https://www.lesswrong.com/posts/d5NyJ2Lf6N22AD9PB/where-to-draw-the-boundary):
+
+> Once upon a time it was thought that the word "fish" included dolphins. Now you could play the oh-so-clever arguer, and say, "The list: {Salmon, guppies, sharks, dolphins, trout} is just a list—you can't say that a list is _wrong_. I can prove in set theory that this list exists. So my definition of _fish_, which is simply this extensional list, cannot possibly be 'wrong' as you claim."
+>
+> Or you could stop playing nitwit games and admit that dolphins don't belong on the fish list.
+>
+> You come up with a list of things that feel similar, and take a guess at why this is so. But when you finally discover what they really have in common, it may turn out that your guess was wrong. It may even turn out that your list was wrong.
+>
+> You cannot hide behind a comforting shield of correct-by-definition. Both extensional definitions and intensional definitions can be wrong, can fail to carve reality at the joints.
+
+One could argue the "Words can be wrong when your definition draws a boundary around things that don't really belong together" moral didn't apply to Yudkowsky's new Tweets, which only mentioned pronouns and bathroom policies, not the [extensions](https://www.lesswrong.com/posts/HsznWM9A7NiuGsp28/extensions-and-intensions) of common nouns.
+
+But this seems pretty unsatisfying in the context of Yudkowsky's claim to ["not [be] taking a stand for or against any Twitter policies"](https://twitter.com/ESYudkowsky/status/1067185907843756032). One of the Tweets that had recently led to radical feminist Meghan Murphy getting [kicked off the platform](https://archive.ph/RSVDp) read simply, ["Men aren't women tho."](https://archive.is/ppV86) This doesn't seem like a policy claim; rather, Murphy was using common language to express the fact-claim that members of the natural category of adult human males, are not, in fact, members of the natural category of adult human females.
+
+Thus, if the extension of common words like 'woman' and 'man' is an issue of epistemic importance that rationalists should care about, then presumably so was Twitter's anti-misgendering policy—and if it _isn't_ (because you're not standing in defense of truth if you insist on a word, brought explicitly into question, being used with some particular meaning) then I wasn't sure what was _left_ of the "Human's Guide to Words" Sequence if the [37-part grand moral](https://www.lesswrong.com/posts/FaJaCgqBKphrDzDSj/37-ways-that-words-can-be-wrong) needed to be retracted.
+
+I think I _am_ standing in defense of truth when I have an _argument_ for _why_ my preferred word usage does a better job at "carving reality at the joints", and the one bringing my usage explicitly into question doesn't have such an argument. As such, I didn't see the _practical_ difference between "you're not standing in defense of truth if you insist on a word, brought explicitly into question, being used with some particular meaning", and "I can define a word any way I want." About which, again, an earlier Eliezer Yudkowsky had written:
+
+> ["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)
+>
+> ["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)
+>
+> ["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)
+>
+> ["There's an idea, which you may have noticed I hate, that 'you can define a word any way you like'."](https://www.lesswrong.com/posts/i2dfY65JciebF3CAo/empty-labels)
+>
+> ["And of course you cannot solve a scientific challenge by appealing to dictionaries, nor master a complex skill of inquiry by saying 'I can define a word any way I like'."](https://www.lesswrong.com/posts/y5MxoeacRKKM3KQth/fallacies-of-compression)
+>
+> ["Categories are not static things in the context of a human brain; as soon as you actually think of them, they exert force on your mind. One more reason not to believe you can define a word any way you like."](https://www.lesswrong.com/posts/veN86cBhoe7mBxXLk/categorizing-has-consequences)
+>
+> ["And people are lazy. They'd rather argue 'by definition', especially since they think 'you can define a word any way you like'."](https://www.lesswrong.com/posts/yuKaWPRTxZoov4z8K/sneaking-in-connotations)
+>
+> ["And this suggests another—yes, yet another—reason to be suspicious of the claim that 'you can define a word any way you like'. When you consider the superexponential size of Conceptspace, it becomes clear that singling out one particular concept for consideration is an act of no small audacity—not just for us, but for any mind of bounded computing power."](https://www.lesswrong.com/posts/82eMd5KLiJ5Z6rTrr/superexponential-conceptspace-and-simple-words)
+>
+> ["I say all this, because the idea that 'You can X any way you like' is a huge obstacle to learning how to X wisely. 'It's a free country; I have a right to my own opinion' obstructs the art of finding truth. 'I can define a word any way I like' obstructs the art of carving reality at its joints. And even the sensible-sounding 'The labels we attach to words are arbitrary' obstructs awareness of compactness."](https://www.lesswrong.com/posts/soQX8yXLbKy7cFvy8/entropy-and-short-codes)
+>
+> ["One may even consider the act of defining a word as a promise to \[the\] effect [...] \[that the definition\] will somehow help you make inferences / shorten your messages."](https://www.lesswrong.com/posts/yLcuygFfMfrfK8KjF/mutual-information-and-density-in-thingspace)
+
+One could argue that I was unfairly interpreting Yudkowsky's Tweets as having a broader scope than was intended—that Yudkowsky _only_ meant to slap down the specific false claim that using "he" for someone with a Y chromosome is "lying", without intending any broader implications about trans issues or the philosophy of language. It wouldn't be realistic or fair to expect every public figure to host a truly exhaustive debate on all related issues every time a fallacy they encounter in the wild annoys them enough for them to Tweet about that specific fallacy.