On 12/27/2013 10:31 PM, Jason Resch wrote:

To that I would add the purely epistemic "non-intepretation" of Peres and Fuchs."No interpretation needed" -- I can interpret this in two ways, one way is to just takethe math and equations literally (this leads to Everett), the other is "shut up andcalculate", which leads no where really.2. Determined by which observer? The cat is always either dead or alive. It's just a matter of someone making a measurement to find out. So are you saying that before the measurement the cat is neither alive nor dead, both alive and dead, or definitely alive or definitely dead? If you, (and I think you are), saying that the cat is always definitely alive or definitely dead, then about about the radioactive atom? Is it ever in a state of being decayed and not decayed? If you say no, it sounds like you are denying the reality of the superposition, which some interpretations do, but then this leads to difficulties explaining how quantum computers work (which require the superposition to exist).Superposition is just a question of basis. An eigenstate in one basis is a superposition in another.Can you provide a concrete example where some system can simultaneously be considered tobe both in a superposition and not? Is this like the superposition having collapsed forWigner's friend while remaining for Wigner before he enters the room?

`?? Every pure state can be written as a superposition of a complete set of basis states -`

`that's just Hilbert space math.`

The collapse for Wigner's friend can be interpreted either epistemically or by MWI. Brent Anny: What happened to that poor cat? It looks half dead. Erwin: I don't know. Ask Wigner. Eugene: I just looked in and it collapsed! -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.