On Sunday, February 3, 2013 12:11:17 PM UTC-5, Bruno Marchal wrote:
> On 01 Feb 2013, at 16:42, Roger Clough wrote:
>  Hi Bruno Marchal 
> I would think that each universe provides its own distinctive
> context to any calculation, including comp. 
> Comp is the assumption that we are Turing emulable.
> That notion is made very solid by Church's thesis.
I don't think that we can assume that a Turing emulation of us is actually 
"us". To the contrary, a Turing emulation of geometry is not geometry. A 
Turing emulation of water can be the same as a Turing emulation of water in 
another Turing emulated virtual world, but no emulated drop of Turing water 
can ever be a genuine drop of water within the world that we actually live 
in. It doesn't matter that 17 is still prime when you are dying of 


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