On Tue, Feb 4, 2020 at 2:48 AM Bruno Marchal <[email protected]> wrote:
> On 2 Feb 2020, at 12:32, Alan Grayson <[email protected]> wrote: > > On Saturday, February 1, 2020 at 11:42:12 PM UTC-7, Brent wrote: > >> First, it's false. You can make it true by interpreting "can happen" to >> mean "can happen according the prediction of quantum mechanics for this >> situation", but then it becomes trivial. Second, it's not "at the heart of >> MWI"; the trivial version is all that MWI implies. Read the first few >> paragraphs of this paper: >> >> arXiv:quant-ph/0702121v1 13 Feb 2007 >> >> Brent >> > > In posing the question, I want to give its advocates such as Clark the > opportunity to justify the postulate. It goes way beyond the MWI and QM. > E.g., it means that if someone puts on his/her right shoe first this > morning, there must be a universe in which a copy of the person puts on > his/her left shoe first. It seems way, way over the top, but oddly many > embrace it with gusto. AG > > > > That is already completely different, as it seems to say that everything > happen with the same probability, but that is non sense, > No, it is exactly what Everett predicts. Everything that happens happens with probability one. All possible outcomes occur with unit probability in any interaction/experiment. David Albert makes the very good point that in your W/M duplication scenario, for example, no first person probabilities for potential outcomes can be defined. > both with Mechanism (the many-worlds interpretation of arithmetic) and > with Everett (the many-worlds formulation of QM). Thinking is presumably > classical so when you take decision, you take the same decision in all > worlds, with rare exceptions. > Only if it is the same person in all those worlds. Different people make different (classical) decisions. Bruce -- 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/CAFxXSLSrNFK1TUUGo94q%3DdB%2BbSAfzuf-XmLQfDT1fu73pfd8Zg%40mail.gmail.com.
