Can someone explain to me in very very simple terms, what she meant by gender isn't a social construct? What is it then? She seemed to imply that gender roles was a social construct though.
One problem that bedevils this whole debate is we have one word - gender - doing double or even treble duty.
As it was traditionally used in social sciences (anthropology, sociology, feminist theory) it meant "the set of roles, dress codes, acceptable behaviours, occupations, legal status, etc. a specific culture deems appropriate for members of one sex or the other." This sense is clearly a cultural construct - Medieval Iceland: weaving is women's work; Medieval England: weaving is a manly occupation and therefore paid twice as much as spinning.
Then there's gender as a synonym for sex because sex is well, y'know, bit naughty and all that. This crept into even the academic literature.
Then there's "gender identity" - a sense of one's own internal manliness or womanliness or in-between-i-ness or neither-ness, which some people report having, and some people don't experience.
My guess is Soh is trying to claim the last of these is rooted in neurology and is thus biological rather than sociological. (There are various counters to this claim: one is that rates of people transitioning seem to vary across cultures, but do seem to be tied to some extent to how rigidly enforced the sex stereotypes understanding of gender is within a society; another is that accounts of what this internal womaliness or manliness consist of often seem to involve a list of sex-stereotypes; a third is phenomena like social contagion in girls schools, for instance, where a number of girls in one class suddenly decide they're trans-boys at a statistical frequency far in excess of the population at large).