Brent Meeker writes:

> >If you include the computer's 
> > data in the program then it becomes an inputless system, a self-contained 
> > simulation. If 
> > you include yourself, the rock and everything else that might interact with 
> > it in one system 
> > you have a self-contained, inputless universe. Both the closed simulation 
> > and the universe 
> > (in the absence of CI type quantum randomness) are at least as 
> > deterministic as what we 
> > normally call a recording, despite all the conditionals, because it is 
> > rather more likely that I 
> > will change a recording than that God will intervene to push rocks around 
> > or provide 
> > computers with miraculous inputs.
> 
> Right.  So within this simulation you may say there are intelligent 
> subsystems by 
> making a somewhat arbitrary cut between subsystem and environment.  This 
> still seems 
> different from a recording though.  The recording is only of the paths 
> actually 
> taken, whereas looking at the program you can see other paths that could have 
> been 
> taken - just as you say the rock computes because you *could have* pushed it 
> the 
> other way.

In a deterministic universe, saying that things could have turned out 
differently had initial 
conditions or physical laws been different is analogous to saying the sound 
coming out of the 
speakers could have been different if the grooves on the record or the 
equalisation in the 
preamp stage had been different.

> And in anycase  there does seem to be quantum randomness.

There does, although the MWI is deterministic. I can't think of any good reason 
why true or 
apparent quantum randomness should be necessary for intelligent behaviour or 
consciousness.

Stathis Papaioannou
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