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.
They do not seem to exist outside of cyberspace.
In Market Square there was a black guy in drag who was taller than me with broader shoulders and I'm over 6' and over 180#. Of course he had a wig that culturally appropriated White females and female clothes that didn't fit his male body properly.
No let's go on to the Carnegie Public Library of Pittsburgh...