+How weasely am I being with these "approximately true" and "as a first approximation" qualifiers and hedges? I claim: not _more_ weasely than anyone who tries to reason about psychology given the knowledge and methodology our civilization has managed to accumulate.
+
+Reality has a single level (physics), but [our models of reality have multiple levels](https://www.lesswrong.com/posts/gRa5cWWBsZqdFvmqu/reductive-reference). To get maximally precise predictions about everything, you would have to model the underlying quarks, _&c._, which is impossible. (As it is written: the map is not the territory, but you can't roll up the territory and put in your glove compartment.)
+
+Psychology is very complicated; every human is their own unique snowflake, but it would be impossible to navigate the world using the "every human is their own unique _maximum-entropy_ snowflake; you can't make _any_ probabilistic inferences about someone's mind based on your experiences with other humans" theory. Even if someone were to _verbally endorse_ something like that—and at age sixteen, I might have—their brain is still going to go on to make predictions inferences about people's minds using _some_ algorithm whose details aren't available to introspection. Much of this predictive machinery is going to be instinct bequeathed by natural selection (as predicting the behavior of conspecifics was very useful in the environment of evolutionary adaptedness), but some of it is the cultural accumulation of people's attempts to organize their experience into categories, clusters, diagnoses. (The cluster-learning capability is _also_ bequeathed by natural selection, of course, but it's worth distinguishing more "learned" from more "innate" content.)
+
+There could be situations in psychology where a good theory (not a perfect theory, but a good theory to the precision that our theories about engineering bridges are good) would be described by a 70-node causal graph, but it turns out that some of the more "important" variables in the graph happen to anti-correlate with each other, such that stupid humans who don't know how to discover the correct 70-node graph, do manage to pattern-match their way to a two-type typology that actually is better, as a first approximation, than pretending not to have a theory. No one matches any particular clinical-profile stereotype _exactly_, but the world makes more sense when you have language for theoretical abstractions like ["comas"](https://slatestarcodex.com/2014/08/11/does-the-glasgow-coma-scale-exist-do-comas/) or "depression" or "bipolar disorder"—or "autogynephilia".
+
+So, if some particular individual trans woman writes down her life story, and swears up and down that she doesn't match the feminine/early-onset type, but _also_ doesn't empathize at all with the experiences I've grouped under the concept of "autogynephilia", I don't have any definitive knockdown proof with which to accuse her of lying, because I don't _know_ her, and the true diversity of human psychology is no doubt richer and stranger than my fuzzy low-resolution model of it.
+
+But the [fuzzy low-resolution model is _way too good_](https://surveyanon.wordpress.com/2019/04/27/predictions-made-by-blanchards-typology/) not to be pointing to _some_ regularity in the real world, and I expect honest people who are exceptions that aren't well-predicted by the model, to at least notice how well it performs on the _non_-exceptions. If you're a magical third type of trans woman (where, again, _magical_ is a term of art indicating phenomena not understood) who isn't super-feminine but whose identity definitely isn't ultimately rooted in a fetish, [you should be _confused_](https://www.lesswrong.com/posts/5JDkW4MYXit2CquLs/your-strength-as-a-rationalist) by the 232 upvotes on that /r/MtF comment about the "it's probably just a fetish" camp—if the person who wrote that comment has experiences like yours, why did they ever single out "it's probably just a fetish" [as a hypothesis to pay attention to in the first place](https://www.lesswrong.com/posts/X2AD2LgtKgkRNPj2a/privileging-the-hypothesis)? And there's allegedly a whole "camp" of these people? What could _that_ possibly be about?!
+
+I _do_ have a lot of uncertainty. What _other_ factors influence people's decision to transition?
+
+[TODO: Desire to be a moral patient. Third casual factor that could be changing in recent years ... Maybe it's really an androphilic–feminine/not-otherwise-specified taxonomy, because non-AGP non-intersex reasons (like Comment 171 internalized misandry) to want to transition would be hard to distinguish from AGP-and-misreporting]
+
+Friend of the blog Tailcalled argues that [there's no discrete typology for FtM](https://www.reddit.com/r/Blanchardianism/comments/jp9rmn/there_is_probably_no_ftm_typology/) as there is for the two types of MtF, because the various causes of gender problems in females vary more independently, favoring spectrum or [simplex](https://en.wikipedia.org/wiki/Simplex) models rather than a typology.
+
+[TODO: But I do have enough evidence to know that the prevailing narrative _doesn't add up_. Serano's proposal makes no predictions.]
+
+Okay, so the public narrative about transness is obviously, _obviously_ false. That's a problem, because almost no matter what you want, true beliefs are more useful than false beliefs for making decisions that get you what you want.
+
+Fortunately, Yudkowsky's writing had brought together a whole community of brilliant people dedicated to refining the art of human rationality—the methods of acquiring true beliefs and using them to make decisions that get you what you want. So now that I _know_ the public narrative is obviously false, and that I have the outlines of a better theory (even though I could use a lot of help pinning down the details, and I don't know what the social policy implications are, because the optimal policy computation is a complicated value trade-off), all I _should_ have to do is carefully explain why the public narrative is delusional, and then because my arguments are so much better, all the smart serious rational people will either agree with me, or at least be eager to _clarify_ exactly where they disagree and what their alternative theory is, so that we can move the state of public knowledge forward together, in order to help the great common task of optimizing the universe in accordance with humane values.
+
+Of course, this is kind of a niche topic—if you're not a male with this psychological condition, or a woman who doesn't want to share all female-only spaces with them, you probably have no reason to care—but there are a _lot_ of males with this psychological condition around here! If this whole "rationality" subculture isn't completely fake, then we should be interested in getting the correct answer in public _for ourselves_.
+
+Men who fantasize about being women do not particularly resemble actual women! We just—don't? This seems kind of obvious, really? _Telling the difference between fantasy and reality_ is kind of an important life skill?! Notwithstanding that some males might want to make use of medical interventions like surgery and hormone replacement therapy to become facsimiles of women as far as our existing technology can manage, and that a free and enlightened transhumanist Society should support that—and notwithstanding that _she_ is obviously the correct pronoun for people who _look_ like women—it's probably going to be harder for people to figure out what the optimal decisions are if no one is allowed to use language like "actual women" that clearly distinguishes the original thing from imperfect facsimiles?!
+
+[TODO: make the dark-side-epistemology/Category-War case ...]
+[TODO: contempt and political posioning]