My question, exactly. If nonbinary identities get recognised, then 'woman' and 'man' must also be pure identities? So if we tick the box for 'woman' or 'female' or 'neither', we are either
a) Choosing biological sex in two cases but not in the third case (nonbinary) which makes no sense because it is mixing together two different definition systems (identity vs. sex0
or
b) Choosing a gender identity in all three cases.
Option b) is troubling because then ticking the female or woman box would seem to mean that I accept the sexist gender roles and stereotypes about people of the female sex?
How someone else defines themselves will then affect what I am.