You have been on threads where people have given definitions, you know full well you have.
I've only ever seen them when they say 'a woman is anyone who identifies as a woman' but as we know, you cannot include in a definition, the thing that you are defining as it is then, by definition, not a definition.
'A splongtat is anything that resembles a splongtat' begs the question, what is a splongtat in the first place.
Anyway back to the question...Is it defamation to state the birth name of a trans activist?