For Chinajan to be awarded BA especially in light of links below that prove precisely the opposite points shows just how little you care about trying to inform yourself on this topic -- and how little Chinajan is.
For both of your information, firstly on the subject of biological sex, there are two words you'd both do well to read up on: karotype (which is, in this context, the sexual chromosomes an organism possesses), and phenotype, which are the observable characteristics of an organism. Usually, but not always, a person's sexual karotype is the same as their phenotype. As a result, there can be in some rare cases people whose genes are XX but who outwardly appear from birth as male, and vice versa. The BA is factually wrong in this regard. Please do some research, TTT -- you *will* learn something.
What's even more odd is that the BA also makes the point that you seem incapable of grasping: that gender is a social construct, which is what this whole argument is about. Non-binary people are those who don't see themselves as fitting in to either the typical male or typical female gender roles, but rather as something different, perhaps in between, and consequently tend to prefer pronouns such as "they" in order to acknowledge this. It's a matter of vocabulary (which I suspect is where Chinajan and I would disagree, as I'd argue that pronouns are gendered, because historically they clearly have been, rather than sex-based).