On 6/8/2015 1:03 AM, Bruno Marchal wrote:
Hmm.... Let us be precise. That the computation take place in arithmetic is a mathematical fact that nobody doubt today. UDA explains only that we cannot use a notion of primitive matter for making "more real" some computations in place of others. It makes the physics supervening on "all computations in arithmetic".
But my computer does some computations and not others. So there must be some sense in which some computations are real and others aren't. Handwaving that they're all there in arithmetic proves too much.
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