I am a male, biologically speaking, but in the name of absurdity, I identified as a girl near the beginning of this sentence, then a boy near the end. Why? Because I feel like it. It’s called gender fluidity.
If a short person thinks they were tall, they're wrong. If a colourblind person thinks they can see colour, they're wrong. So when a male feels like they're female, and it's pretty clear that all empirical evidence concludes they're male, then they're wrong.
Sorry, it's just a fact.
We could talk about intersex people. Yes, a very small number of people, on the surface, blur the line between male and female. However, for the vast majority of people, it's clear that they're either male or female.
“But Jay,” a person would object, “gender and sex are two different things.” And my response to that is, it isn’t.
Gender is not something we cannot deduce or quantify. There’s a reason why the majority of people don’t identify as one of the over sixty genders that exist out there, from “two-spirited” to “genderqueer.”
Which leads me to the last, but perhaps, the most central point:
The way we’re deluding ourselves.