I was on the liberal side of this debate (I can't control how other people refer to me, cis can just mean 'not trans') but then I decided to Google....
😱
These 'definitions' (which are in actual dictionaries FFS) turn us all into believers and people with DSDs (who can change their birth certificates by way of a correction) into trans people. Outrageous.
I still think the concept of not-trans has its uses. In conversations with trans friends, about hospital wards for instance, we use the word 'women' to mean completely different things, and ambiguity is only avoided because we already know each other's views. We don't have that luxury when, say, interpreting a Labour Party statement.