I accept this over-simplifies it but, if you have a Y chromosome, you are male. If you don't, you are female. A tiny minority (0.5% to 1.7%) have a DSD (Disorder of Sexual Development) - i.e. they are intersex. Even the majority of intersex people follow the same rule biologically and a tiny proportion have conditions like AID (Androgen Insensitivity Syndrome) and a very tiny proportion are true hermaphrodites.pelmut wrote: ↑Sat Jan 20, 2024 6:52 pm
You must have had to search back before Watson and Crick in the early 1950s to find it (possibly to pre-Darwinian times). I can also find 'science' to prove the phlogiston theory and 'science' based on the elements of Air, Earth, Fire and Water, but biology, physics and chemistry have long-since abandoned those theories in favour of ones that explain the facts better.
Aside from the "disorders" (as they are called in medicine in the term DSDs), a person's sex is essentially binary. We develop to produce either sperm or eggs - and that applies to people who call themselves non-binary as much as it applies to those of us who are comfortable being male or being female.