I’m not sure if he’s claiming to be a physicist or even to have a deep understanding of this field. Indeed his role was in the IC not as a scientist. I think there are far more pressing questions that should be answered about his claims beyond whether he knows/remembers the difference between many worlds or extra dimensions from high degree class.There’s no evidence he was referring to the many worlds interpretation of quantum mechanics, which isn’t part of a QM Class syllabus anyway (other than perhaps a philosophical side note).
He could have been referring to the extra dimensions that string theory requires but that’s not QM per se. and won’t be taught in an QM class for an physics degree. and those dimensions aren’t like ours anyway.
Is he claiming to be an actual physicist working on the frontiers of QM theory? I don’t think so. In fact, I’ve not seen anything indicating his background enough to know what his degree(s) might be in.
My point is that when people preface a statement with their degree they are e intending to put extra weight and credibility about the statement. Since his statement makes no sense from a physics point of view it actually undermines his credibility not bolsters it.
It would have made more sense if he said “I *don’t* have a degree in physics, but…”
I don’t think this is a derail because it speaks directly to his credibility, which, without direct evidence, is all we have to go on for judging his claims.