On 3/1/2022 1:59 PM, Tomas Pales wrote:

On Tuesday, March 1, 2022 at 8:14:31 PM UTC+1 meeke...@gmail.com wrote:

But before we can assess whether something has a consistent description we need to specify the description precisely. With a vague description we may be missing an inconsistency lurking somewhere in it or there may appear to be an inconsistency that is not really there. For example, if we try to describe a quantum object in terms of classical physics the description will not be precise enough and the assumptions inherent in those terms will be contradictory. The ideal description would reveal the complete structure of the object down to empty sets but we can't physically probe objects around us to that level.

    I think that's a cheat.   It's not that classical physics was
    imprecise.  It was just wrong.  QM and Newtonian mechanics even
    have different ontologies.  If you're wrong about the subject
    matter no amount of logic will correct that.  Logic only
    explicates what is implicit in the premises.  It's a cheat to
    appeal to an ideal description when you have no way of producing
    such a description  or knowing if you have achieved it or even
    knowing whether one exists .


It's not a cheat, it's a complete mathematical description. Every mathematical structure can be ultimately described as a pure set. Classical physics and quantum physics have not been described as pure sets and so they are not complete mathematical descriptions. The fact that it is not feasible for us to achieve such a description of physical structures doesn't mean that it doesn't exist.

And the fact that you can form a sentence using the word doesn't mean it exists either.

Brent

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