On 5/20/2012 10:03 AM, Quentin Anciaux wrote:

    3) Is there at least one physical system running the computations?

No, if the UDA is correct... well technically there still could be a primitive physical universe, but you could not use it to correctly predict your next moment, nor what you see, and you would not be able to know what it is (because all of what is accessible to you is in the computations that support you, still if computationalism is true).

If there is a primitive physical universe, and it's Turing emulable, then you could in principle know it's program.


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