What does it mean to be "assigned male at birth"? You are either born male or you are not, no?
I put really in the scare quotes because if gender is a social construct rather a bit of physical anatomy, then no one is "really" a particular gender.
It's neither. If gender were determined by sex, trans people wouldn't exist by definition. If gender were a social construct, every tomboy would just be a boy (if, of course, I am understanding those social-construct people).
