Radical feminists believe bodies are sexed but brains are not, while trans rights activists and their liberal feminist handmaidens believe brains are sexed but bodies are not.

There is no biological distinction between the brain and the body. It's all the body and it's all governed by genetics and undergoes evolution.

Men and women are different in every respect, including cognitively, due to differences in genetics. (They have different averages for each trait or different probabilities of having a certain trait)