On Thu, Mar 31, 2011 at 10:20:58PM -0500, meekerdb wrote:
> 
> Couldn't the person have been born at different times too?  QM
> Hamiltonians are time symmetric.  If you try to infer the past you
> also have unitary evolution - just in the other direction.  So I'm
> wondering where the arrow of time comes from in this view?
> 
> Brent

The arrow of time comes from tieing the 1st person view (observer
moment) to the 3rd person unitary evolution via the anthropic
principle. Not all 3rd person states support the 1st person view.

I don't see what difference time translation symmetry of the birth
moment makes.

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Prof Russell Standish                  Phone 0425 253119 (mobile)
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