I think I'm with you but I don't understand how this is a criticism of QBism (if that's indeed what it is). It's possible for one's beliefs to turn out to be completely wrong because of some secret actions which you were not aware of. This is just as true classically as in the quantum regime. I don't see that this requires more of an explanation than we've already given it.
Sure, “little” would have been a better term to use but the context of my post was well established. If your only quibble was the use of that solitary word then you’re being pointlessly pedantic.
What Von Neumann -- or anyone else -- would or would not call it doesn't change the truth of the matter.
Von Neumann also believed that consciousness was required to collapse the wave function. This is a non-falsifiable and hence non-scientific theory (which is the problem with all collapse theories). Von Neumann was a really bright guy, and he very nearly got the right answer, just as Lorentz very nearly got to relativity before Einstein. But just as Lorentz refused to let go of the idea of Galilean invariance, Von Neumann refused to let go of the idea that classical reality is a primary phenomenon. It isn't. Classical physics is an emergent, not a primary phenomenon. There are no particles, only quantized fields. (To be fair, Von Neumann did not live long enough to see Bell's theorem or the Aspect experiment, so he didn't quite have all the information he needed. But he was bright enough that he probably could have come up with Bell's theorem on his own if he'd decided to go that direction.)
Yes, but landlords also pay taxes on profits. As a homeowner, you won't pay tax on the difference between rental cost and your mortgage interest payment.
