On 31 Mar 2013, at 16:16, John Clark wrote:

On Sat, Mar 30, 2013 Joseph Knight <joseph.9...@gmail.com> wrote:> True or False: COMP implies that any fundamental physical constantis non computable?I still don't know exactly what "COMP" means

`It is the hypothesis that there is a level of description of your`

`brain such that your consciousness (or first person experience) would`

`remain unchanged in case your brain, or body, is replaced by a`

`computer emulating it at that level, or below.`

`It is the idea that your brain is a machine, even if natural and`

`physical.`

but about 1860 Maxwell computed the speed of light and that iscertainly a fundamental constant, not only that but his mathematicssaid that computed speed of light would always be the sameregardless of the speed of the observer or of the source of thelight. But of course Maxwell didn't start from zero, he had to knowwhat the values of the magnetic constant and the electric constantare, and as far as we know those numbers can only be obtained fromexperiment. At the time electricity and magnetism didn't seem tohave anything to do with light but Maxwell showed that they did.

`Getting number by experiment does not provide information on the`

`computability issue of some possible constant occurring in physics.`

`Most mathematical constants are computable or reductible to computable`

`functions on the non negative integers, and individual non computable`

`object occur mainly in mathematical logic and theoretical computer`

`science.`

Bruno

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