And I wouldn't say (without great care) that decoherence "provides evidence that there aren't physical structures". It depends on how you define a physical structure.
I define 'physical structure' as in the physics sense -- the specific arrangment of constituent parts, that has observable attrubutes like Size, Mass, Position, Momentum and forces holding the structure together. Example:
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Example of superposition of states(unobservable by definition):
A physical structure that does not retain its physical defining characteristics at all times cannot unambiguously be regarded as a physical structure. The only definition that is not misleading is to call it 'event', isn't it?
You said I've missed the point. Have I? I clearly stated that superpositions are a huge conceptual issue. My only assertion that you quoted was that the emergence of the macro world as we perceive it is not a problem - one can easily see how the feeling of hardness, fullness, definiteness arises.
Okay, but it's not very obvious, as the exact underlying mechanism is still not there, but it's easier on the brain, than say a wave that sends signals ftl and directs particles(and fewer assumptions seem to be made).
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