Simples. - Lemmy.World

I’m just picturing that robot from Star Trek (the one thinking about “this sentence is false”) going “huh” and then blowing up…

It actually is really simple. If you’re born with XY chromosomes, you’re a man. If you have XY chromosomes and ambiguous genitalia that can look like a vagina, then you’re a man with a Disorder of Sex Development (DSD).

Men with DSDs will often have elevated testosterone levels because they also have testicles, sometimes underdeveloped and/or undescended. That’s not what makes them a man though, it’s their XY chromosomes.

Disorders of sex development - Wikipedia

that’s, like, a third graders understanding of biology and reality is nowhere near that convenient
What is incorrect about it?
To oversimplify, every human has an X chromosome and it is necessary to survive. The Y chromosome is optional and codes for some additional traits that make a person male. Chromosomes aren’t foolproof and genes and in some cases entire chromosomes can essentially be turned off. However, since we have two of each chromosome this is often not a problem. So, if parts of the Y chromosome turn off, you potentially turn off the mechanisms that make a person male. In which case the person would remain the default of female.