The incoherence the author is referencing is not about the evolving meaning of words, be it organically over time or imposed by fiat by an ideology.
It's about using a term to mean several different things depending on what is most useful.to the argument at any given moment.
I get a little
about articles like this which have clearly benefitted from mining the discussion here over the years, tbh, but my pragmarism will out.
I think it might have been @terryleather who posted a list of all the internal contradictions in transactivist/genderist arguments. It's a complete chameleon in character- if it serves to be the tinest group of people, then transwomen will be statistically rarer than hen's teeth and you probably have never even spoken to one. If it serves to be ubiquitous, transwomen will have been just about everywhere you've been and you've interacted with them loads and never even noticed.
The incoherence isn't a bug, it's a useful feature because the intent is not to clarify or make a fair case, which is is precisely why #NoDebate was a thing, the intent is to enforce submission and compliance. The TRAs who employ these tactics lack one very important thing, and I suspect it might their undoing in the long term - integrity.