[I was advocating Everett as being a better approach since there is no magical collapse of the wave function. But then Dr. Kelley Ross points out that in in Bohr there must be an observer (somewhere) for Quantum mechanics to work. And this two level of reality is essential to Kant and Plato also.
[I also want to mention that Everett's many worlds theory does not mean many universes, but can simply be different areas in our universe where the different possibilities of QM come to be.]
I think it is important to mention here that even in Everett, there is an observer. So the two levels of reality are preserved. I.e., in Bohr if u have two and one observes the other then there is a collapse of the wave function. But someone outside of that system can see them both as one system and thus still connected by one wave function. [You can see that even a piece of matter like an electron can have a wave function--because of E=mc^2. So the outer observer sees just these two inner people as a connected wave.]
When you say "QM just gets larger and larger as far as one wants to go," I take that to mean that there is no "magical collapse" of the wave function, ever. This "Everett" must be one of the people who doesn't like the dualism implied in quantum mechanics.
He's not alone, although usually it goes the other way, that the reality of the wave is dismissed and particles affirmed. But it is hard to leave out the particle part, since particles do at times behave like particles: They have definite location (within Uncertainty) and Dirac's mathematics for them postulates a geometrical point, which a wave is not.
So this doesn't seem right or helpful to me. The whole idea of a Kantian quantum mechanics is that the dualism is preserved, as in Kant's metaphysics. You don't like that?
KR
