"Biological sex" can mean
- external phenotype
- internal organs
- hormones
- chromosomes
Use all four, and you'll divide the population four different ways - and with four different groups of "neither".
"Biological sex" is incoherent.
And all because the 'phobes are scared of AGAB.
I could write a whole article on "biological sex". Maybe I will, one day (although many other people already have).
The key points are:
1. It isn't the immutable dimorphic characteristic the 'phobes think it is, and
2. sex assigned at birth is as much a social as it is a "biological" marker.
This is why we (humans) use a social construct - assigned at birth after a *very* cursory inspection - which functions ok for *most* people.
But not all.
And that shouldn’t be a problem. Because why would it be?