I see what you’re saying. Something like “there are two sets of characteristics and most folks grab from the majority of one or the other. Therefore we can place everyone into one sex or the other.”

I feel like when I first read your comments I took issue with how black and white your words seemed. I still kinda feel that.

Is there some structure that’s presense or lack there of definitely defines sex for every person? If so I think its fair to call sex a binary.

I feel like I’d only be convinced if I could understand what makes the options only 0 or 1 yk? It doesn’t seem to be chromosomes, which is what I was taught growing up. X/Y Chromosomes have more that two ways of existing in humans.

I’ll read through those wiki articles a bit. To me it seems like your saying that there is some kind of structure that has no middle ground in humans. It always only goes one way or the other. No variation. It’s hard for me to picture life doing that. If ya have any more info to point to I’d be down to look at it.