On 3/11/2012 11:41 PM, Stephen P. King wrote:
An Evil Wizard could pop into my vicinity and banish me to the Nether plane! A "magical act", if real and just part of a story, is an event that violates some conservation law. I don't see what else would constitute magic... My point is that Harry Potterisms would introduce cul-de-sacs that would totally screw up the statistics and measures, so they have to be banished.


Because otherwise things would be screwed up?

Chain-wise consistency and concurrency rules would prevent these pathologies, but to get them we have to consider multiple and disjoint observers and not just "shared" 1p as such implicitly assume an absolute frame of reference. Basically we need both conservation laws and general covariance. Do we obtain that naturally from COMP? That's an open question.

You seem to be begging the question: We need regularity, otherwise things 
wouldn't be regular.

Brent

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