Makes a much better case for you then the first article, that actually was the opposite of your view,
I'm not even going to try and pretend that I understand genetic science. But......
I can understand from the article how a twin embryo could be formed. That is something that makes sense to to me. The other thing that makes sense could be the presence of different DNA that sits on the XX or XY chromosome. To me that would explain as the article pointed why there is a size difference in genatilla. Same as height or hair color. So I understand your's and other reluctance to say that there are only 2 genders. It would be like saying there are only to heights. Tall or Short.
However even with this sliding scale you are scientifically XX female with ovaries or XY with testies. The sliding scale explains hormonal differences that can lead to feminine types of males [who may or may not be bi or homosexuals] or masculine women with facial hair/ [who may or may not turn into bi or homosexuals]
I read this study as different shades of the same hair color.
The problem arises in the rules society. Does the strawberry blond use the Red headed or the blond bathroom. What if they were black haired bleached to blond? What does the poor bald headed guy to do?
To me, most of our countries problems and division come down to "Political Correctness" The biggest problem with it is right there in the first word. It's "Political" and so many people just don't see that. I remember being a young adult in the mid-80's when I first heard the term. "Being PC" Hell I was on board. I didn't want want hurt anyone or be mean. it seemed the polite thing to do. Not ######, mentally challenged. Not handicapped, handicapable. Only after I matured and started to think as an individual did I understand that being "PC" was a progressive trick to control the language. As a matter of fact as I right this, I believe my pivot point on this was watching a George Carlin routine.
It's all BS. Look at the American First thread. we are ripping each other apart over BS and whataboutism. I dove into it over gay marriage debate not that long ago. I dont care how people live the or protecting the sanctity of marriage. I don't think the government should even be in the marriage business.
The war over language control is what's driving this hate. The left has been winning this war, but its led to Trump. The pendulum has swung back. The left is trying desperately to hold the ground its gained. The right is giving up their values and principles to push back. Why. Because it feels good.
Sorry for going off track with the rant, I would have started a new thread. but i'm no Tim