I guess you are trying to pursue an argument from authority. The only authority I respect is knowledge and intellect, and I don't think you have demonstrated much of either (by making an argument from authority most notably!).
Copenhagen interpretation is not favored much among physicists despite your claims. Maybe 50 years ago.
Copenhagen interpretation posits a hitherto unexplained event: "wave collapse", and even implies that this event is inexplicable, that it rests beyond the domain of physics. Thus, this is just a metaphysical farce. Bohr and Heisenberg probably were simpletons per philosophy, they must have held dualist views or they would not put forward this nonsense. Their interpretation is invalid scientifically prima facie, metaphysical statements can never be scientific.
As for your knowledge of philosophy of science, I don't think you know much either. Falsification is not necessarily required. Verification is sufficient to pursue a theory (induction). Falsifiable cases are icing on the cake in my opinion, and controlled experiments as such are very valuable in practice. Has testable predictions of any kind come from MWI meta-theory? I think it'd be fantastic to have it, but I don't think that this meta-theory, which seems roughly at the level of an interpretation or mathematical theory yet, is not logically unfalsifiable. How did you reach that conclusion, one wonders. And I don't think you've followed the recent publications on MWI either. It has far more credibility among physicists than you think.
On the other hand, if MWI is true (And I did not say it is, but it *can* be true unlike Copenhagen or the ultra-stupid Von Neumann interpretation which makes the dualism in Copenhagen explicit, again Von Neumann was a great mathematician and engineer, but unfortunately he was a frakking moron when it came to philosophy). Then, the wave function of the multiverse would be real, if *this* is true, and then, I think, this would mean that the world-line branches in the Everett multiverse would *not* be disjoint. In other words, perhaps this implies that the observations are not quite real, which would have strange consequences in interpretations.
Anyway, I am not an expert on the subject, but I happen to know the philosophical aspects quite well. You are welcome to offer a proof that MWI meta-theory is fundamentally unverifiable. So far, you have merely asserted such a thing with no citation, no argument, nothing at all. Is this how you conduct all your arguments? They are non-sequitor or very weak.
But yes, you would be a hero among the stupid dualists for defending such a mysticist interpretation, and since most people are idiots who believe in dualism, I think you would even find a fair audience! But to convince an actual philosopher, you have to do better than appealing to the idiocy of the masses.
Before you answer you might want to read this FAQ:
Logically, if there is one thought experiment test of the theory, then, it is also possible to design a more feasible test. At least this seems to show that the theory is not logically untestable. I don't think an AI should be needed, Deutsch is probably flying too high there.
I sometimes like smartasses, but not always. Now, did you actually have an argument, or were you just regurgitating stuff you heard from your dim-witted friends at the faculty?