404. But have you heard the term "bimodal distribution"?

I'm sorry but the text you quoted is nonsense. Alien exozoologists could very well write about Homo sapiens "rarely they are born without brains, and die quickly." They would be correct to do so. However, this is quite a minute and usually irrelevant feature of the species. If they go into enough detail, they would write it.

There are more transgender people born than anencephalic people (... if they can even be called that).

And sterile people aren't non-people. They are people, so a very detailed description of the species would say that some people are sterile, sometimes because they are intersex.

> All “intersex” conditions, when examined, clearly arise from single-gene mutations or chromosomal aberrations on a genetic background that would have indisputably been producing male or female gametes had these mutations not occurred

so what? this is meaningless. This is searching for plausible sounding arguments to justify a desired conclusion.

> Therefore the “intersex” argument against the sex binary is simply not valid. Intersex individuals exist

therefore sex is not completely binary. It doesn't matter why. You are reaching for plausible sounding arguments, that on closer inspection still make no sense. Some people are male, some are female, and some are neither, therefore, it is not true that all people are male or female. QED. This is very basic logic. Defying very basic logic is nonsense. You might as well argue that 1+1=3, we just haven't seen it yet.

> Sex in mammals is on a fundamental level binary and immutable

What would it take to disprove this for you? I have a feeling that if someone designed a gender change ray that could convert a human male into a human female, in all aspects including cellular genetics, genitals, and brain structure, you'd still say sex was immutable and the ray didn't really do that.

> claims that “intersex'” individuals disprove that can only be made in the absence of any consideration of the biological nature of humans

Claims that sex is strictly binary, rather than bimodal, can only be made while looking the emperor in the eye and saying his clothes are gorgeous. Intersex people exist, and they are not male or female - that's the definition. But you don't want to hear it, and would rather pretend they somehow don't count. That's the denial here.

Alternatively, perhaps you believe that sex is a property that is not shared by all people. That is, perhaps you believe that some people do not have a sex. Is this the case?

Keep in mind: just because something is on pubmed, doesn't make it true. "Trust the science" is bullshit, right?

> 404.

It seems they were trying to link to this article, but mangled the link: https://www.nas.org/academic-questions/33/2/in-humans-sex-is...

It's a thoughtful piece that discusses sex in a much broader and more fundamental biological context than just our human species.

It would be worth reading the whole thing rather than just the quoted section.

> Claims that sex is strictly binary, rather than bimodal, can only be made while looking the emperor in the eye and saying his clothes are gorgeous.

I think you may be confusing sex with sex-linked traits.

For example: testosterone levels. If you sample a randomly selected population of humans and plot this variable, it will show a bimodal distribution.

But this is because the sample contains two discrete populations that have an average difference between them in that variable: males with higher testosterone and females with lower testosterone.