-This is true in a tautological sense: if you deliberately define your category boundaries in order to get the answer you want, you can get the answer you want, which is great for people who want that answer, and people who don't want to hurt their feelings [(and who don't mind letting themselves get emotionally blackmailed)](/2017/Jan/dont-negotiate-with-terrorist-memeplexes/).
+This is true in a tautological sense: if you deliberately gerrymander your category boundaries in order to get the answer you want, you can get the answer you want, which is great for people who want that answer, and people who don't want to hurt their feelings [(and who don't mind letting themselves get emotionally blackmailed)](/2017/Jan/dont-negotiate-with-terrorist-memeplexes/).
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+But it's not very interesting to people like rationalists—although apparently not all people who _self-identify_ as rationalists—who want to use concepts to _describe reality_.
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+Alexander gives an account of a woman whose ability to function at work was being disrupted by obsessive-compulsive fears of leaving her hair dryer on at home, whose problems were solved by the simple expediency of taking the hair dryer with her when leaving the house. Given that it _worked_ to resolve the woman's distress, we shouldn't care that this isn't how the problems that are categorized as _obsessive-compulsive disorder_ are "supposed" to be treated, and Alexander argues that the same should go for accepting transgender identity claims: if it _works_ for resolving people's gender dysphoria, why not?
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+The problem is that there are _significant disanalogies_ between leaving a hair dryer in the front seat of one's car, and agreeing that gender should be defined on the basis of self-identity. The former has no appreciable effects on anyone but the person themselves; the latter affects _everyone who wants to use language to categorize humans by sex_. The words _man_ and _woman_ [are top-20 nouns](https://en.wikipedia.org/wiki/Most_common_words_in_English#Nouns)! People need those nouns to describe their experiences!
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+(Even if you're [not a fan of gender roles](/2017/Dec/theres-a-land-that-i-see-or-the-spirit-of-intervention/) and wish that people were less eager to distinguish humans by sex when it's not absolutely necessary—to the extent that not everyone shares this value or wants to apply it in _all_ areas of life, it matters how the categories are defined.)
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+Imagine if the patient in the hair dryer story was obsessed with the fear not just that _she_ might accidentally leave her hair dryer plugged in unattended, but that that _someone_ might do so, and that it would burn down the whole city. In this slightly modified scenario, insisting that everyone in the city put their hair driers in the front seat of their cars doesn't look like an appealing solution.
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