I want to rescue this from my account on the birdsite but I once got into arguing with TERFs (it happens, try not to judge me too harshly) and as a biologist I just wanted to push back a little on the "it's just biology" line, so I wrote the following:
Okay, sex determination in humans.
This shit is COMPLICATED and this will probably be a longish thread. Sorry. But I've seen a lot of people claim that "biology says" that everyone is either male or female, full stop, and it's just not true. 1/22