[lbo-talk] What's at stake?/AI again

John Thornton jthorn65 at mchsi.com
Thu Nov 20 16:26:20 PST 2003



>Btw, all
>thinking, algorithmic or not, _can_ be represented as
>the output of a Turing machine, but it turns out that
>this is not a useful or illuminating fact beyond the
>most abstract level of analysis. jks

I don't think so. The definition of what is or isn't computational (i.e. algorithmic) is whether it can or can not be done with a Turing machine. The Church-Turing Thesis is that Turing machines are formal versions of algorithms. No computational procedure is an algorithm unless it can be presented as a Turing machine. Church's work shows that any computable (i.e. algorithmic) function can be transformed into an expression in the lambda-calculus. Church's work is equivalent to Turing's description of a LCM. What non-algorithmic function did you have in mind?

John Thornton



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