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Anatoly_Vorobey comments on What false beliefs have you held and why were you wrong? - Less Wrong Discussion
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Probably a lot of different things, for example: revulsion at some of the traditional gender roles and behaviors. Negative emotions about their sexual organs. Intense erotic pleasure while imagining themselves the opposite sex. Anxiety due to not feeling what they think the person of their sex is supposed to feel.
Memes that provide an explanation of one's behavior in terms of one's identity are insanely powerful. They spread because they lead you from from "I don't understand why I'm like this" to "I understand why I'm like this", and the latter feeling is something we all lust for.
The truth value is not especially important to the initial spread of an attractive identity-meme. Consider that "people are born gay" is almost a dogma in the LGBT community and liberal circles, although the available scientific understanding sharply contradicts it. Or recall that the 19th century saw a very potent meme in which gay people self-identified as "the third sex", "a female psyche in a male body". It seems that many gay people in the 19th century really felt very strongly that they have a "female psyche" or a "female soul", similarly to how today many biological-X transgender people feel very strongly that they have a "non-X brain".
That historical example did a lot to persuade me. Do you have any others similar to it?
I used to share your position, but moved away from it. The main reason I did is studies such as the ones mentioned in this article:
http://online.wsj.com/articles/SB10001424052702304854804579234030532617704.
How do you explain such results?
The article is behind a login wall. It would help linking directly to studies instead of a badly accessible article about them.
To guess at the point, we find that obesity within the US has a strong genetic component. On the other hand we find that obesity strongly changes over the time span of decades. The fact that something seems to be genetic within one population seems no good evidence that there are no societal factors involved.
I didn't know there was a login wall. Try this one: http://www.newscientist.com/article/dn20032-transsexual-differences-caught-on-brain-scan.html#.VEgMHPSTZD0?
The article wasn't mentioning genetics, it was about nMRIs.
The problem with nMRI scans is that if you believe in physicalism, you'd expect every aspect of someone to show up on a sufficiently advanced brain scan. Also, I wonder how many brain regions they tried before finding one that displayed the correct pattern.