On 09 Dec 2012, at 02:23, meekerdb wrote:

On 12/8/2012 2:47 AM, Bruno Marchal wrote:People change over time and the meaning of the pronoun associatedwith that changing person will change over time too, and themeaning of the pronoun will change even more suddenly if aduplicating chamber is used.But both remember the protocol, and make sense of the P=1/2, anduse it correctly in future iterated experiences.I suppose P=1/2 comes from an implicit symmetry. But that's notanalogous to probabilities in QM which and take a range of realvalues. And that's one of the problems with Everett's MWI - itimplies that when there are two equi-probable choices then theremust be two orthogonal worlds which by symmetry haveprobability 1/2, but if the two outcomes have probabilities0.5+x and 0.5-x where x is some transcendental number theninfinitely many parallel worlds must come into existence toinstantiate the right measure, even though x is very small.

`In QM+CTM, the probabilities are given by P = A^2 (with A the`

`amplitude of the wave, and it gives the relative measure, always on an`

`infinite sets of worlds). I know this can be debated (and infinities`

`can be replaced by big numbers in some discrete physics, but they`

`contradict CTM).`

`In "pure CTM", you can manage to have any proportion you want in any`

`iteration, if only by "killing" some consistent extensions.`

Bruno

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