I am familiar with the literature on detransitioning, and your delightful anecdotes about social contagion are not research.
And again, I'm not asking about research, I'm asking you to assess, consider and explain the situation I described. Even if it was hypothetical - would it be social contagion or not?
I mean, I know I've seen it happen at first hand, so have many of my friends and other MNers. Yes that's anecdotal, so let's leave research aside for now. I'm asking you: what do you think could cause that? You're deliberately evading the question, which is interesting. Because if you don't think trans identities spread through social contagion, you surely have a clear, convincing understanding of, and explanation for, why all or most of the girls in a group would claim a special gender identity when it's super-fashionable, then drift away from it. That is to do with it being their trrue, innate gender identity.
Instead all you can say is "no, only research matters" when you yourself are making reference to lots of debunked, misrepresented and biased "research".
Haver you actually arrived at any of your views through a process of rational pondering, or do you literally only think what you're told to think by genderist propaganda in order not to be tarred a bigot? Because that would be pretty meme-like in itself.