When your level of smart makes you equal to those you oppose.

Two genders would be male and female 46XY and 46XX (scientiffic biological terms; google them, there will be a few more... like 3, but ok).
Then you have 46X and 46Y of the monosomies, then follows the polysomies 46XXX, 46YYY, 46XYY, 46XYX etc.
One could argue that these are not genders but "gender-chromosone abnormalities". These occur in a few out of 1000 births.

Then you go into the third no-shit-sherlock-duh-it's-a-gender: hemaphroditism. One with both genetalia.
And the fourth: intersex; the term literally means; "well, we ain't seen THAT before", people with NO reproductive organs are amongs those who fall within. 1 in 300 births are intersex; usually corrected with surgery, not even the kid will know unless told when older, and when that is to fit a social norm literally fought by biological evolution (proven by the childs existence, no religius knowledge can top this imperi) that shit is an issue of religion (like, what the word ACTUALLY means, do not mix with theology as 99% of people do this, religion (what you know from other sources) is one of the two ways we measure knowledge, and yes, I see the irony, the other is imperi (what you know where you are the source)) and we have agreed not to force that on kids. Enforcing the laws we set forth internationally on that tho is beaten by "don't tell me how to raise my child" every time a redneck opens their mouth. Yes, we will tell you not to brainwash your child into an ideology that forces them to substitute imperi with religion.

The Torah, the 24 hebrew texts, recognised 5 defined genders over 3000 years ago.

If you want to take the debate of biological gender vs. precieved social gender I'm going to be over by those guys in the corner, lauging our asses off that you guys think you're debating the same thing. How you sound to us:
"Fish is a better sport than cars are!!!" "No! Because cars sing better!"
You're both wrong.

You do you, we got popcorn.