I found this interesting, and Hank is always a nice listen. Bit of an eye-opener re the biology, at least for me. Imagine, if you watch the video, that given we have even less a handle on the workings of the brain, what spectrum of subtle differences may also obtain in behavior based on similar biological factors. Pardon if already discussed. Came across it and thought it germane.
What a steaming pile of excrement (for clarity, that doesn't refer to your post but to the content of the video). Let's take a moment to debunk this pseudo-science in full.
SciShow said:
In high school biology, we learn that humans are born with either XX or XY chromosomes, and that a person’s internal and external sex organs match those chromosomes.
No source is provided for this claim, and as several commenters on the video noted this claim is false as - while the exact curriculum can vary across different schools - plenty of high school biology teachers include genetic variations in their lessons. It's also setting up a strawman, as sex in biology is defined by gamete type and not by chromosomes.
So we have one lie and one strawman, and we haven't even clicked play yet.
SciShow said:
In high school biology, we usually learn that the sexes in humans are fixed and concrete. Whether you're male or female is black-and-white and rooted in your DNA: your 23rd pair of chromosomes is either two X chromosomes or and X and a Y. That's it. End of story. And that's essentially what scientist thought too.
Another blatant lie. Sex chromosomal variations were already included in textbooks in the late 60s. Again, of course, no source is provided for this claim.
SciShow said:
In fact, biologists today are saying sex is a spectrum.
The next blatant lie. Biologists today are saying sex is binary, just like biologists from half a century ago.
SciShow said:
But in reality, none of the traits we use to discriminate between the sexes are truly binary.
And yet another lie, gamete types are strictly binary with only sperm or ova. Indeed,
there is a million dollar prize (like the James Randi prize) for anyone who can demonstrate the existence of a third gamete type in human reproduction. If this youtube channel is so certain about their claims, why haven't they gone and collected it? The answer, of course, is the same as for why nobody managed to collect the James Randi prize.
In typical woo style they then try to dazzle their audience by linking to a bunch of scientific articles, obviously hoping that nobody would actually go and check these. I only bothered to go and check
the first source they give, and of course it doesn't support the video's claims at all. Plenty of people in the comments have been checking their other sources too, should one be interested.
To sum up, a long-winded string of lies and strawmen packaged up in a veneer of science. And now I'm going back to my position of not posting in moderated threads, but this video was just too egregious to let pass.