> On 27 Sep 2019, at 23:24, 'Brent Meeker' via Everything List > <[email protected]> wrote: > > > > On 9/27/2019 12:35 AM, Philip Thrift wrote: >> BTW Sabine Hossenfelder just posted her Many Worlds view: >> >> http://backreaction.blogspot.com/2019/09/the-trouble-with-many-worlds.html >> <http://backreaction.blogspot.com/2019/09/the-trouble-with-many-worlds.html> > Sabine writes: > > The reason is this. In the many worlds interpretation, if you set up a > detector for a measurement, then the detector will also split into several > universes. Therefore, if you just ask “what will the detector measure”, then > the answer is “The detector will measure anything that’s possible with > probability 1.” > > This, of course, is not what we observe. We observe only one measurement > outcome. The many worlds people explain this as follows. Of course you are > not supposed to calculate the probability for each branch of the detector. > Because when we say detector, we don’t mean all detector branches together. > You should only evaluate the probability relative to the detector in one > specific branch at a time. > > That sounds reasonable. Indeed, it is reasonable. It is just as reasonable as > the measurement postulate. In fact, it is logically entirely equivalent to > the measurement postulate. > > This turns on "we only observe one measurement outcome" and this "...is > logically equivalent to the measurement postulate" But the MWI says that we > observe all possible outcomes just as the detector measures all possible > outcomes. She seems to elide the observer splitting, and assumes there's a > "soul" or "person" that doesn't split but instead goes to only one branch of > the MW.
Right, and that is the usual confusion between 1p and 3p, or between []p and []p & p. It is the W-guy saying to the journalist in Washington: “let us forget the M-guy” as we are not in Moscow. Bruno > > Brent > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/2b3361d2-b424-234a-6fc9-45e124355efc%40verizon.net > > <https://groups.google.com/d/msgid/everything-list/2b3361d2-b424-234a-6fc9-45e124355efc%40verizon.net?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/77848733-BD8B-4BAB-9CF3-8ECE33F61512%40ulb.ac.be.
