From: gerry@bindweed.com   
      
   In article <5A87FEC6.2030006@xs4all.nl>, bergervo@xs4all.nl says...   
   >   
   > On 2/13/2018 10:05 PM, Lawrence Crowell wrote:   
   > > On Monday, February 12, 2018 at 12:52:38 AM UTC-6, Steven Carlip wrote:   
   > >> On 2/11/18 3:42 AM, SEKI wrote:   
   >     ..   
   > > What is really weird is not so much quantum mechanics, but rather   
   > > classical or macroscopic physics. How stable states of matter occur that   
   > > are stable against perturbations and are some selected basis in a   
   > > quantum system is what is strange.   
   >   
   > Do you have a preferred explanation? How can the (appearance) of   
   > these classical states follow from the QM description of states   
   > in a superposition with unitary time-evolution?   
   >   
   > 1) Is all this classical behavior just some kind of optical   
   >     illusion and are we really in a superposition?   
   > 2) Is the unitary time-evolution wrong and does the actual   
   >     time evolution project superpositions on single states?   
   > 3) Do you see a third way out?   
      
   I assume it ultimately boils down to the anthropic principle.  No   
   universe can be intelligently observed that is not compatible with the   
   evolution of intelligent observers.   
      
   - Gerry Quinn   
      
   [[Mod. note -- I don't see how the anthropic principle helps resolve   
   the QM question under discussion.   
   -- jt]]   
      
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