-And these posts hammered home the point over and over and over and _over_ again—culminating in [the 37-part grand moral](https://www.lesswrong.com/posts/FaJaCgqBKphrDzDSj/37-ways-that-words-can-be-wrong)—that word and category definitions are _not_ arbitrary, because there are optimality 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)
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-> ["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)
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-> ["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)
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-> ["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)
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-> ["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)