The first is sex, in which case we should be talking about things like Turner's syndrome and XYY syndrome
Yes, and nearly all those cases do in fact cluster with one of the two "standard" genders. And the very rare exception to this are generally not the people who are claiming to be "transsexual".
The second would be coming up with a definition of gender, and seeing if it matches our definition of sex.
You can come up with whatever definition you want, I don't see why I should are about IffThen!gender.
There are some long lists of false beliefs that programmers hold. isn't because programmers are especially likely to be more wrong than anyone else, it's just that programming offers a better opportunity than most people get to find out how incomplete their model of the world is.
I'm posting about this here, not just because this information has a decent chance of being both entertaining and useful, but because LWers try to figure things out from relatively simple principles-- who knows what simplifying assumptions might be tripping us up?
The classic (and I think the first) was about names. There have been a few more lists created since then.
Time. And time zones. Crowd-sourced time errors.
Addresses. Possibly more about addresses. I haven't compared the lists.
Gender. This is so short I assume it's seriously incomplete.
Networks. Weirdly, there is no list of falsehoods programmers believe about html (or at least a fast search didn't turn anything up). Don't trust the words in the url.
Distributed computing Build systems.
Poem about character conversion.
I got started on the subject because of this about testing your code, which was posted by Andrew Ducker.