To re-state: "in the vast majority of cases, binary enough" Yes, there are always exceptions. Some people have six fingers or two heads. That is not license to

To re-state: "in the vast majority of cases, binary enough" Yes, there are always exceptions. Some people have six fingers or two heads. That is not license to pretend that, given a human skeleton, we cannot make any inferences about their... role in the human reproductive cycle and society, to avoid the contentious terms of "sex" and "gender". That's like saying we can't tell if a coin will land heads 50% of the time, because sometimes we get 10 heads in a row.