Stathis Papaioannou wrote:
> Brent Meeker writes:
>
> > >>> If you died today and just by accident a possible next
> > >>> moment of consciousness was generated by a computer a trillion years in 
> > >>> the
> > >>> future, then ipso facto you would find yourself a trillion years in the 
> > >>> future.
> > >> That's the whole problem. I could just as easily find myself in an HP
> > >> universe. But I never do.
> > >
> > > Not "just as easily". If you are destructively scanned and a moment from 
> > > now 2 copies
> > > of you are created in Moscow and 1 copy created in Washington, you have a 
> > > 2/3 chance
> > > of finding yourself in Moscow and a 1/3 chance of finding yourself in 
> > > Washington. It is a
> > > real problem to explain why the HP universes are less likely to be 
> > > experienced than the
> > > orderly ones (see chapter 4.2 of Russell Standish' book for a summary of 
> > > some of the
> > > debates on this issue), but it is not any more of a problem for a 
> > > mathematical as opposed
> > > to a physical multiverse.
> >
> > I'm not sure what a mathematical MV is: if you mean the Tegmark idea of the 
> > set of all mathematically consistent universes then I think you're wrong.  
> > There is no measure defined over that set (and I doubt it's possible to 
> > define one).  But the physical universe obeys the laws of QM and it appears 
> > that eigenselection, as proposed by Zeh, Joos, and others, may provide a 
> > natural measure favoring order.
>
> What if the set of all mathematically consistent universes were actually, 
> physically instatiated?
> My point is that physical instantiation per se does not solve the HP problem, 
> unless we say that
> only the non-HP universes are instantiated, making "multiverse" narrower than 
> "all mathematically
> consistent universes".

That is a variation on measure. Uninstiated universes have measure
0.


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