+To which I now realize the correct answer is—_yes!_ Yes, it's cheating! Category-membership claims of the form "X is a Y" [represent hidden probabilistic inferences](https://www.lesswrong.com/posts/3nxs2WYDGzJbzcLMp/words-as-hidden-inferences); inferring that entity X is a member of category Y means [using observations about X to decide to use knowledge about members of Y to make predictions about features of X that you haven't observed yet](https://www.lesswrong.com/posts/gDWvLicHhcMfGmwaK/conditional-independence-and-naive-bayes). But this AI trick can only _work_ if the entities you've assigned to category Y are _actually_ similar—if they form a tight cluster in configuration space, such that using the center of the cluster to make predictions about unobserved features gets you _close_ to the right answer, on average.
+
+The rules don't change when the entity X happens to be "my female analogue" and the category Y happens to be "me". The ordinary concept of "personal identity" tracks how the high-level features of individual human organisms are stable over time. You're going to want to model me-on-Monday and me-on-Thursday as "the same" person even if my Thursday-self woke up on the wrong side of bed and has three whole days of new memories. When interacting with my Thursday-self, you're going to be using your existing mental model of me, plus a diff for "He's grumpy" and "Haven't seen him in three days"—but that's a _very small_ diff, compared to the diff between me and some other specific person you know, or the diff between me and a generic human who you don't know.
+
+In everyday life, we're almost never in doubt as to which entities we want to consider "the same" person (like me-on-Monday and me-on-Thursday), but we can concoct science-fictional thought experiments that force [the Sorites problem](https://plato.stanford.edu/entries/sorites-paradox/) to come up. What if you could _interpolate_ between two people—construct a human with a personality "in between" yours and mine, that had both or some fraction of each of our memories? (You know, like [Tuvix](https://memory-alpha.fandom.com/wiki/Tuvix_(episode)).) At what point on the spectrum would that person be me, or you, or both, or neither? (Derek Parfit has [a book](https://en.wikipedia.org/wiki/Reasons_and_Persons#Personal_identity) with lots of these.)
+
+People _do_ change a lot over time; there _is_ a sense in which, in some contexts, we _don't_ want to say that a sixty-year-old is the "same person" they were when they were twenty—and forty years is "only" 4,870 three-day increments. But if a twenty-year-old were to be magically replaced with their sixty-year-old future self (not just superficially wearing an older body like a suit of clothing, but their brain actually encoding forty more years of experience and decay) ... well, there's a reason I reached for the word "replace" (suggesting putting a _different_ thing in something's place) when describing the scenario. That's what Yudkowsky means by "the change is too sharp"—the _ordinary_ sense in which we model people as the "same person" from day to day (despite people having [more than one proton](/2019/Dec/on-the-argumentative-form-super-proton-things-tend-to-come-in-varieties/) in a different place from day to day) has an implicit [Lipschitz condition](https://en.wikipedia.org/wiki/Lipschitz_continuity) buried in it, an assumption that people don't change _too fast_.
+
+The thing about Sorites problems is that they're _incredibly boring_. The map is not the territory. The distribution of sand-configurations we face in everyday life is such that we usually have an answer as to whether the sand "is a heap" or "is not a heap", but in the edge-cases where we're not sure, arguing about whether to use the word "heap" _doesn't change the configuration of sand_. You might think that if [the category is blurry](https://www.lesswrong.com/posts/dLJv2CoRCgeC2mPgj/the-fallacy-of-gray), you therefore have some freedom to [draw its boundaries](https://www.lesswrong.com/posts/d5NyJ2Lf6N22AD9PB/where-to-draw-the-boundary) the way you prefer—but [the cognitive function of the category is for making probabilistic inferences on the basis of category-membership](https://www.lesswrong.com/posts/esRZaPXSHgWzyB2NL/where-to-draw-the-boundaries), and those probabilistic inferences can be quantitatively better or worse. Preferences over concept definitions that aren't about maximizing predictive accuracy are therefore preferences _for deception_, because "making probability distributions less accurate in order to achieve some other goal" is exactly what _deception_ means.
+
+That's why defining your personal identity to get the answer you want is cheating. If the answer you wanted was actually _true_, you could just say so without needing to _want_ it.
+
+When [Phineas Gage's](/2017/Dec/interlude-xi/) friends [said he was "no longer Gage"](https://en.wikipedia.org/wiki/Phineas_Gage) after the railroad accident, what they were trying to say was that interacting with post-accident Gage was _more relevantly similar_ to interacting with a stranger than it was to interacting with pre-accident Gage, even if Gage-the-physical-organism was contiguous along the whole strech of space time.
+
+Same principle when Yudkowsky wrote, "If I fell asleep and woke up as a true woman [...] I don't think I'd call her 'me'". The claim is that psychological sex differences are large enough to violate the Lipschitz condition imposed by our _ordinary_ concept of personal identity. Maybe he was wrong, but if so, that cashes out as being wrong _about_ how similar women and men actually are (which in principle could be operationalized and precisely computed, even if _we_ don't know how to make it precise), _not_ whether we prefer the "call her me" or "don't call her me" conclusion and want to _retroactively redefine the meaning of the words in order to make the claim come out "true."_
+
+Do people ever really recover from being religious? I still endorse the underlying psychological motivation that makes me prefer the "call her me" conclusion, the _intention_ that made me think I could get away with defining it to be true. Now that I don't believe that anymore—now that I can't take for granted that actual women aren't a somewhat unfathomable Other onto me—my world hasn't collapsed in the way religious people [tend to fear](https://www.lesswrong.com/posts/3XgYbghWruBMrPTAL/leave-a-line-of-retreat) when their most precious belief is threatened. It just means I have to do [a little more intellectual work](https://arbital.greaterwrong.com/p/rescue_utility) to figure out what's actually right. [People can stand what is true, for we are already doing so.](https://www.readthesequences.com/You-Can-Face-Reality)
+
+-------
+
+<a id="coda"></a>
+
+### Coda
+
+> And Durham—the software puppet, the lifeless shell animated by a being from another plane—looked him in the eye and said, "You have to let me show you what you are."
+>
+> —_Permutation City_ by Greg Egan
+
+Anyway, that—briefly (I mean it)—is the story about my weird obligate sex fantasy about being a woman and how I used to think that it was morally wrong to believe in psychological sex differences, but then I gradually changed my mind and decided that psychological sex differences are probably real after being deeply influenced by this robot-cult blog about the logic of Science. It's probably not that interesting? If we were still living in the socio-political environment of 2009, I'm pretty sure I wouldn't be blogging about my weird sexual obsessions (as evidenced by the fact that, in 2009, I wasn't blogging about them).
+
+Imagine my surprise to discover that, in the current year, my weird sexual obsession is suddenly at the center of [one of the _defining political issues of our time_](https://en.wikipedia.org/wiki/Transgender_rights).
+
+All this time—the dozen years I spent reading everything I could about sex and gender and transgender and feminism and evopsych and doing various things with my social presentation (sometimes things I regretted and reverted after a lot of pain, like the initials) to try to seem not-masculine—I had been _assuming_ that my gender problems were not of the same kind as people who were _actually_ transgender, because the standard narrative said that that was about people whose ["internal sense of their own gender does not match their assigned sex at birth"](https://www.vox.com/identities/21332685/trans-rights-pronouns-bathrooms-sports), whereas my thing was obviously at least partially an outgrowth of my weird sex fantasy—I had never interpreted the beautiful pure sacred self-identity thing as an "internal sense of my own gender".
+
+_Why would I?_ In the English of my youth, "gender" (as a single word, rather than part of the phrase "gender role") was understood as a euphemism for _sex_ for people who were squeamish about the potential ambiguity betweeen _sex_-as-in-biological-sex and _sex_-as-in-intercourse. (Judging by this blog's domain name, I am not immune to this.) In that language, my "gender"—my sex—is male. Not because I'm necessarily happy about it (and I [used to](/2017/Jan/the-erotic-target-location-gift/) be pointedly insistent that I wasn't), but as an observable biological fact that, whatever my pure beautiful sacred self-identity feelings, _I am not delusional about_.
+
+Okay, so trans people aren't delusional about their [developmental sex](/2019/Sep/terminology-proposal-developmental-sex/); the claim is that their internal sense of their own gender is in some sense more real or more relevant and should take precedence.
+
+So where does that leave me? This post is about my _own_ experiences, and not anyone else's (which I obviously don't have access to). I've _mentioned_ transgenderedness several times in the main body of this post, but I've tried to cast it as explanation that one might be tempted to apply to my case, but which I don't think fits. Everything I've said so far is _consistent_ with a world in which Blanchard (who coined the obvious and perfect word for my thing while studying actual transsexuals) was dumb and wrong, a world where my idiosyncratic weird sex perversion and associated beautiful pure sacred self-identity feelings are taxonomically and etiologically distinct from whatever brain-intersex condition causes _actual_ trans women. That's the world I _thought_ I lived in for the ten years after encountering the obvious and perfect word.
+
+My first clue that I wasn't living in that world came from—Eliezer Yudkowsky. In [a 26 March 2016 Facebook post](https://www.facebook.com/yudkowsky/posts/10154078468809228), he wrote—
+
+> I'm not sure if the following generalization extends to all genetic backgrounds and childhood nutritional backgrounds. There are various ongoing arguments about estrogenlike chemicals in the environment, and those may not be present in every country...
+
+> Still, for people roughly similar to the Bay Area / European mix, I think I'm over 50% probability at this point that at least 20% of the ones with penises are actually women.
+
+(***!?!?!?!?***)
+
+> A lot of them don't know it or wouldn't care, because they're female-minds-in-male-bodies but also cis-by-default (lots of women wouldn't be particularly disturbed if they had a male body; the ones we know as 'trans' are just the ones with unusually strong female gender identities). Or they don't know it because they haven't heard in detail what it feels like to be gender dysphoric, and haven't realized 'oh hey that's me'. See, e.g., <https://sinesalvatorem.tumblr.com/post/141690601086/15-regarding-the-4chan-thing-4chans> and <https://slatestarcodex.com/2013/02/18/typical-mind-and-gender-identity/>
+
+> But I'm kinda getting the impression that when you do normalize transgender generally and MtF particularly, like not "I support that in theory!" normalize but "Oh hey a few of my friends are transitioning and nothing bad happened to them", there's a *hell* of a lot of people who come out as trans.
+
+> If that starts to scale up, we might see a really, really interesting moral panic in 5-10 years or so. I mean, if you thought gay marriage was causing a moral panic, you just wait and see what comes next ...
+
+Indeed—here we are just 4¾ years later, and _I am panicking_. (As 2007–9 Sequences-era Yudkowsky [taught me](https://www.yudkowsky.net/other/fiction/the-sword-of-good), and 2016 Facebook-shitposting-era Yudkowsky seemed to ignore, the thing that makes a moral panic really interesting is how hard it is to know you're on the right side of it—and the importance of [panicking sideways](https://www.lesswrong.com/posts/erGipespbbzdG5zYb/the-third-alternative) [in policyspace](https://www.overcomingbias.com/2007/05/policy_tugowar.html) when the "maximize the number of trans people" and "minimize the number of trans people" coalitions are both wrong.)
+
+At the time, this was merely _very confusing_ to hear coming from the guy who wrote "Changing Emotions". I left a careful comment in the Facebook thread (with the obligatory "speaking only for myself; I obviously know that I can't say anything about anyone else's experience" [disclaimer](https://www.overcomingbias.com/2008/06/against-disclai.html)), quietly puzzled at what Yudkowsky could possibly be thinking ...
+
+A month later, I moved out of my mom's house in Walnut Creek to live on the correct side of the [Caldecott tunnel](https://en.wikipedia.org/wiki/Caldecott_Tunnel), in Berkeley: closer to other people in the robot-cult scene and with a shorter train ride to my coding dayjob in San Francisco.
+
+(I would later change my mind about which side of the tunnel is the correct one.)
+
+[...] doing a little bit more reading ... I _don't_ think Blanchard was dumb and wrong. [TODO: actually explain the typology] I think the two-type taxonomy is _basically_ correct, as a first approximation. (Where psychology is complicated enough such that there's much more to be said about what that means, and what better approximations would look like, but simple theories that [explain a lot of our observations](https://surveyanon.wordpress.com/2019/04/27/predictions-made-by-blanchards-typology/) are better than pretending not to have a theory.) I think a _substantial majority_ of trans women under modern conditions in Western countries are, essentially, guys like me who were _less self-aware about what the thing actually is_.
+
+So, I realize this is an inflamatory and (far more importantly) _surprising_ claim. Obviously, I don't have introspective access into other people's minds. If someone claims to have an internal sense of her own gender that doesn't match her assigned sex at birth, on what evidence could I _possibly_ have the _astounding_ arrogance to reply, "No, I think you're really just a perverted male like me"?
+
+Actually, lots. For example, in April 2018, the /r/MtF subreddit (which currently has 90,000 subscribers) [posted a link to a poll: "Did you have a gender/body swap/transformation "fetish" (or similar) before you realised you were trans?"](https://archive.is/uswsz). The [results of the poll](https://strawpoll.com/5p7y96x2/r): [_82%_ said Yes](/images/did_you_have-reddit_poll.png). [Top comment in the thread](https://archive.is/c7YFG), with 232 karma: "I spent a long time in the 'it's probably just a fetish' camp".
+
+Certainly, 82% is not 100%. Certainly, you could argue that Reddit has a sampling bias such that poll results and karma scores from /r/MtF fail to match the distribution of real-world MtFs. But if you don't take the gender-identity story as a _axiom_ and [_actually look_](https://www.lesswrong.com/posts/SA79JMXKWke32A3hG/original-seeing) at the _details_ of what people say and do, these kinds of observations are _not hard to find_.
+
+Informal Reddit poll isn't "scientific" enough for you? Fine. The scientific literature says the same thing: [TODO: cite as many 80% surveys as I can from Kay Brown's bibliography].
+
+Worried about leading survey questions pointing to the wrong conclusion, and want more detailed (if not standardizable and quantifiable) accounts? Me too! And there's lots!
+
+[TODO: McCloskey, or how did I missed this from Serano 2007]
+
+> There was also a period of time when I embraced the word "pervert" and viewed my desire to be female as some sort of sexual kink. But after exploring that path, it became obvious that explanation could not account for the vast majority of instances when I thought about being female in a nonsexual context.
+
+[TODO: Nevada. Nevada specifically dissess the Blanchard account, as do people I talk to. One said AGP transition could be possible but very rare, and the same goddamned person is on the record as being into TF porn at 19 when their dysphoria kicked in; or someone dissed Blanchard, but endorses Anne Vitale, which makes the same observations and arrives at the same taxonomy, but dresses it up in socially-desirable language]
+
+[TODO: Twitter anecdotes?]
+[TODO: Dr. Will Powers backlink]
+
+[...]
+
+http://www.avitale.com/developmentalreview.htm
+
+> As sexual maturity advances, Group Three, cloistered gender dysphoric boys, often combine excessive masturbation (one individual reported masturbating up to 5 and even 6 times a day) with an increase in secret cross-dressing activity to release anxiety.
+
+Got that? To _release anxiety_—their terrible, terrible _gender expression deprivation anxiety!_
+
+After having seen enough of these _laughable_ denials of autogynephilia, the main question in my mind has become not, _Is the two-type feminine–androphilic/autogynephilic taxonomy of MtF transsexualism approximately true?_ (answer: yes, obviously) and more, _How dumb do you (proponents of gender-identity theories) think we (the general public) are?_ (answer: very, but this assessment is accurate).
+
+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. 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.) [TODO: reductionism links]
+
+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_ 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 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 the /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?!
+
+[TODO: I have a lot of uncertainty. What is an ETLE, really? What are other factors influencing transition decisions? 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]
+
+Someone asked me: "Wouldn't it be embarrassing if the community solved Friendly AI and went down in history as the people who created Utopia forever, and you had rejected it because of gender stuff?"
+
+But the _reason_ it seemed _at all_ remotely plausible that our little robot cult could be pivotal in creating Utopia forever was _not_ "[Because we're us](http://benjaminrosshoffman.com/effective-altruism-is-self-recommending/), the world-saving good guys", but rather _because_ we were going to discover and refine the methods of _systematically correct reasoning_.