On 1/23/2014 11:59 PM, Bruno Marchal wrote:
Only the idealized computations of Turing.  Computations in my computer always 
stop.

Because you assume that it exists in some ontological sense. That might be possible. My point is that if this was really the case, you can't say "yes" to the doctor "qua computatio". You can say "yes" to the doctor by invoking some magic.

You've written that several times, but I don't understand the point. What difference does it make if all computations stop? Wasn't that part of Turing's definition of a computation - a Turing computer process that stopped. Just because I note that my computer will always stop and presumably my neurons will stop, doesn't entail that all processes must stop. And even if they did, why would that cause me to say "no" to the doctor.

Brent

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