> On 17 Feb 2020, at 22:13, 'Brent Meeker' via Everything List > <[email protected]> wrote: > > > > On 2/16/2020 6:09 AM, Bruno Marchal wrote: >> >>> On 16 Feb 2020, at 05:50, 'Brent Meeker' via Everything List >>> <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> >>> >>> On 2/15/2020 9:09 AM, smitra wrote: >>>>> >>>>> That's funny, since 20 lines above you invoked the_ lack_ of >>>>> isolation to explain measurements. >>>>> >>>>> Brent >>>> >>>> Measurement can be fully described by local interactions, so it's >>>> compatible with the entire system comprising of measured system plus >>>> observer, being completely isolated. >>> >>> In a completely isolated system it can only be a mixed state FAPP unless >>> there is non-unitary evolution. >> >> Is not the physical universe (assuming that exists) completely isolated? If >> you were right, there would be no quantum mechanics. You lost me here. > > MWI gets around this by saying there are multiple worlds...but only FAPP.
Lol. Well, for the fear life that might be plausible (alas). > Other interpretations like the transactional interpretations say there is > non-unitary evolution. Yes, and I think that David Deutsch consider it as a variant of the MW, once you make it unitary again. I am not an expert of the transactional interpretations (Cramer). I bet that Deutsch is correct on this. 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/af6760e0-f4d9-9401-e063-02e7c77a3bbe%40verizon.net > > <https://groups.google.com/d/msgid/everything-list/af6760e0-f4d9-9401-e063-02e7c77a3bbe%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/21875AD2-C3AD-48D9-9C40-D99B5CA272E7%40ulb.ac.be.
