Up until recently (and my intervention) my work had multiple aws accounts tied to individual people, where they had inherited a personal account into the billing org.
There are also, in business use, some domains where an executive personally owns the registration but has delegated DNS into the company. There is no written agreement.
A former employer completely lost access to a couple of social media accounts (twitter/$company, etc) after laying off enough people.
I'm not sure if you're kidding or what but the mothers in that paper had 46 (the normal number) of XX chromosomes, a female with a mosaic-type defect containing some Y - successfully giving birth further proves these were female humans.
tl;dr: All boy moms will have some proportion of XY cells lodged in their bodies until they die. And this can result in them showing up as genetically male on a DNA test, simply because they once gave birth to a boy. When you get down to a cellular or molecular level, notions of "sex" or even "individuality" are far more blurry than our mental models admit. Sorta like recent findings that by cell count, humans are only about 43% human, and the rest is the bacteria making up our microbiome, and that our microbiome can have significant impact on our behavior.
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