One of the most stupid, annoying "gotchas" I've heard from #TERFS is that "#Gender isn't #binary, but #sex is" and then they go into some dumb bullshit that's wrong about "#science." And this pisses me off very much because not only is it #transphobic as hell, it's also patently, 100% scientifically untrue in an easily demonstrable way: Intersexed people exist. There is XXY, and also XO (singular X chromosome). Sex is not XX and XY. Even in the same person, some cells might be XX and some XY.