On Mon, 7 Sep 2020 at 08:50, Bruce Kellett <bhkellet...@gmail.com> wrote:

> On Mon, Sep 7, 2020 at 3:34 AM 'Brent Meeker' via Everything List <
> everything-list@googlegroups.com> wrote:
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>> It's because Bruce takes the Born probability as the probability
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>> that some sequence exists (i.e. 1) instead of the probability it is
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>> the observed sequence, ( |a|^2 ).
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> That is the source of the disagreement. There are two possible questions:
> 1) In the N repeats of the binary outcome experiment, what is the
> probability that the sequence containing all ones will occur?; and 2) what
> is the probability in this scenario that I will experience the
> sequence of all ones?
>
> If we are using the theory to calculate probabilities, the first question
> is the relevant one, and the theory gives two different answers , so the
> theory is inconsistent. If our concern is only about ourselves, and not
> about what the theory says, then the second question is the appropriate
> one. Then there is no inconsistency, because we know that we will only see
> one sequence -- which one we do see can only be determined post hoc, and
> that is not a probabilistic matter. The 1p/3p confusion here is all yours,
> not mine. What gives you the right to maintain that the Born rule is only
> about what you will experience? And not about objective probabilities?
>

An observer knows (under MWI) with certainty that some version of him will
see a particular outcome, but he wants to know what the probability is that
he will see that outcome. If you think that this is not a legitimate
interest then it is more a psychological issue than a scientific one.


-- 
Stathis Papaioannou


-- 
Stathis Papaioannou

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