On 2/18/2013 9:30 PM, Stathis Papaioannou wrote:


There is no argument presented in this article. The stock market and brain and indeed most natural systems are chaotic, but that is not the same as being not computable.

Hi Stathis,

I agree with you Stathis, but effective non-computability is just as strong as in principle non-computability. The issue of resource availability cannot be ignored. Stephen Wolfram's article on the intractability of simulating physical systems pretty much nails this argument down: http://www.stephenwolfram.com/publications/articles/physics/85-undecidability/2/text.html



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