On 6/29/2014 1:35 AM, Bruno Marchal wrote:
Note that it is an arithmetical fact that arithmetic emulates all simulations. Saying that some of those are more real than other is a metaphysical assumption, and MGA shows that it is a gap-of-the-god type of assumption.
But it is not a physical fact that arithmetic exists. And to say that arithmetic emulates all simulations seems to me to 'prove to much'. It's just saying that whatever exists in your physical theory is already in my arithmetical theory. Which is a god-of-the-substrate type argument.
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