As it happened, the next day, Wednesday, we saw these Tweets from @ESYudkowsky, linking to a _Quillette_ article interviewing Lisa Littman on her work on rapid onset gender dysphoria:
-> [Everything more complicated than](https://twitter.com/ESYudkowsky/status/1108277090577600512) protons tends to come in varieties. Hydrogen, for example, has isotopes. Gender dysphoria involves more than one proton and will probably have varieties. https://quillette.com/2019/03/19/an-interview-with-lisa-littman-who-coined-the-term-rapid-onset-gender-dysphoria/
+> [Everything more complicated than](https://twitter.com/ESYudkowsky/status/1108277090577600512) protons tends to come in varieties. Hydrogen, for example, has isotopes. Gender dysphoria involves more than one proton and will probably have varieties. [https://quillette.com/2019/03/19/an-interview-with-lisa-littman-who-coined-the-term-rapid-onset-gender-dysphoria/](https://web.archive.org/web/20190320012155/https://quillette.com/2019/03/19/an-interview-with-lisa-littman-who-coined-the-term-rapid-onset-gender-dysphoria/)
>
> [To be clear, I don't](https://twitter.com/ESYudkowsky/status/1108280619014905857) know much about gender dysphoria. There's an allegation that people are reluctant to speciate more than one kind of gender dysphoria. To the extent that's not a strawman, I would say only in a generic way that GD seems liable to have more than one species.