On 2/21/2013 9:06 PM, Joseph Knight wrote:
On Thu, Feb 21, 2013 at 10:56 PM, meekerdb <meeke...@verizon.net
<mailto:meeke...@verizon.net>> wrote:
On 2/21/2013 7:10 PM, Joseph Knight wrote:
Question: Why is the "derivation"* of the Born Rule in (Everett, 1957) not
considered satisfactory**?
*Everett shows that the amplitude-squared rule for subjective probability
is the
only measure consistent with an agreeable additivity condition.
Gleason's theorem is to the same effect. But both start with the
assumption that
the wave-function amplitude determines the probability - and then they show
it must
be via the Born rule.
OK, I see, thanks. I suppose then that the decision-theory derivation drops
this assumption?
It doesn't make it explicitly, but I think it makes an equivalent assumption which is why
the problem isn't regarded as solved.
Brent
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