+If the extension of common words like 'woman' and 'man' is an issue of epistemic importance that rationalists should care about, then presumably so is 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's _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) needs to be retracted.
+
+I think I _am_ standing in defense of truth if 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, a previous 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)
+>