Settle the dispute with the strong, simple argument. Sweep up all the edge cases and put them in place.
Anything with a Y chromosome is male, period. IDGAF about genitals. Y = male. No Y = female. Couldn't be simpler.
Oh, and shame the tranny for using someone's real health problems as an excuse to parade their own public perversion. If I was XXY, I'd be FURIOUS at trannies.
No eggs = not a woman.
That would trigger them so much more, because it truly highlights how a tranny is just a dude with a dress.
And if it's a zippertip, then challenge her to a fist fight with a man of her same weight.
Like I said, low hanging fruit.
There is no arguing with low hanging fruit. They will not listen and they do not care
It fails as a hard binary.