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Aaron Sterling
The Dershowitz/Falkovich proof of the Extended Church-Turing Thesis - http://nanoexplanations.wordpress.com/2011...
In a previous post, I considered a proof of the Church-Turing Thesis that Dershowitz and Gurevich published in the Bulletin of Symbolic Logic in 2008.  It is safe to say that the proof is controversial — not because it is technically inaccurate, but because it relies on an axiomatization of computation that excludes randomness, parallelism [...] - Aaron Sterling