OK, I've lost track of who's snipping whom, but this comes from a dialogue between Neil and Fiona:
As I understand it, there is a fine semantic difference between gender and sex. Sex is biologically determined [...] Gender is culturally - or
ideologically - determined, and doesn't necessarily correlate with biological sex. It is possible, though
rare, for individuals to be of a different gender to their sex
Whereas I would say that there is an immense semantic difference between gender and sex. I would say that transsexuals are people who believe that in a real sense, their gender is discordant with their bodies and sex of assignment. However, there are an infinite number of gender roles and ways to perform them--Soolin and Servalan don't perform femininity in the same way, for instance. Kerrill's chromosomes certainly haven't changed between the beginning and the end of City at the Edge of the World but her gender performance has.
-(Y)