But, Ferning, in a binary system, where there is only 0 or 1, on or off, male or female, XX or XY,
where is there room for defects?? 
You're either male or female, XX or XY, right? If you're XXX, or if you are XY and have testosterone levels as high as an XX, or if you have gonads for both sexes,
are you XX or XY? Which category do you fit into? And, most importantly,
who decides?Lambert tells us that
science says there is only XX or XY. That is all there is to it. If you're XX, you are the male gender. You like sports and dress in pants and are aggressive and don't wear make-up. If you are XY you can dress in a dress and are not very aggressive and can wear make-up. He tells us it's
biology. XX or XY is all you need to know. There is no room for variation. No room for an XX to feel like an XY, or vice versa. No room for girly men or manly women. Just XX or XY.
What this mini-lecture illustrations is that
there is nothing but variations. With all these steps involved, how often does it happen perfectly? The defects he lists are just the major ones, the ones that have such a profound influence on the outcome that it is obvious that something did not go correctly. But think of all the minor defects that can occur. Ones that aren't immediately obvious, or even detectable in most cases. Different levels of hormones or different development of the brain. Ones that may influence a person's personality or perceptions of their own sexuality.
A vast majority of us probably have at least one of these minor defects. Does that mean then that these minor defects are "features?"
Real science says sex is not binary, but a continuum. Most people, a vast majority, can be divided into the two sexes, if you ignore the subtle differences between individuals in the two categories. But there are those who still don't fit neatly into either category. Those with major differences from either sex. Jamming them into one or the other sex is like jamming a triangle into either a circular or square hole. Sure, if you use a hammer, you might get them into one hole or the other, but that doesn't mean they should be there or that they fit.

There is far, far more to sex that just XX and XY, according to science. It is far more complicated than that. You can't hide behind "science" when you espouse that political position. Because that fits into science like a triangle into a square hole.
