syscourse, abuse mention, long
if you say that it's been scientifically proven that trauma causes multiplicity you either don't know what scientifically proven means or know of, and endorse, horrific abuse and presumably illegal experimentation.
to prove causation scientifically* entails an experiment with a control and test group and comparing the difference between the two.
in terms of sorting out causation of multiplicity that means purposely traumatizing a, fairly large if you want a decent effect size, group of children for years, in order to see if they end up plural. that is not only horrifically unethical and evil, there is no way to get that past an ethics board which means its never going to be done.
also science still can't agree if multiplicity is a real thing, so if you say that there is a fucking consensus on the cause you have no what you are talking about.