Let's get rid of this one step at a time. Gender is a synonym for biological sex. This means that there are two, male and female. Every gender on the mental side is some combination of those two genders. Also, hard, solid science, is meant to say that science. is based on facts we know are true and is made of facts we also know are true, therefore you aren't allowed to break its rules. AND ALSO, if you are only disliking the gender one, why are you not just saying that? Instead, you're calling the whole tweet narrow-minded when you're only talking about a fifth of it.