> On 25 Jun 2018, at 18:49, Brent Meeker <[email protected]> wrote: > > > > On 6/25/2018 4:14 AM, Bruno Marchal wrote: >>> On 24 Jun 2018, at 21:30, Brent Meeker <[email protected]> wrote: >>> >>> >>> >>> On 6/24/2018 8:36 AM, Bruno Marchal wrote: >>>>> On 21 Jun 2018, at 22:19, Brent Meeker <[email protected]> wrote: >>>>> >>>>> >>>>> >>>>> On 6/21/2018 2:16 AM, Bruno Marchal wrote: >>>>>>> On 20 Jun 2018, at 00:47, Brent Meeker <[email protected]> wrote: >>>>>>> >>>>>>> >>>>>>> >>>>>>> On 6/19/2018 8:16 AM, Bruno Marchal wrote: >>>>>>>>> Most of these objections to CI are answered by decoherence theory. >>>>>>>> I have no clue how to interpret decoherence with a collapse theory. >>>>>>> You use decoherence theory until you get to the reduced density matrix >>>>>>> that is diagonal FAPP (or for all conscious purposes) and then you >>>>>>> declare it is exactly diagonal and cut the other "worlds" loose. >>>>>> But why adding that last steps? Why to make the diagonal exact if not to >>>>>> cut the other worlds? >>>>> Because if you don't, a further evolution may undo the >>>>> measurement/perception. >>>> I know it looks sad, but that is not an argument. In fact undoing some >>>> measurement/perception might be required for overall consistency, and is >>>> also a useful quantum gate. >>>> >>>> The squared amplitudes can be asymptotical, and get the number zero is not >>>> always possible, but all what counts is to be relatively small to have >>>> enough determinism to keep the partial control. >>> And how much is that? >> Enough to get two or three decimals right, like in all sciences. Enough to >> get a man on the moon, and build electronic microscope. In nanotechnology we >> might need more decimals correct, and what counts is the probability that >> the client is satisfied, or the patient cured. Only in metaphysics, we have >> to reject a theory if the 100^1000th decimal is wrong. Metaphysics has not >> the notion of “FAPP”, because the purpose is not practical at all. It >> concerns a possible knowledge only. > > Right. And I thought you claimed to be doing metaphysics, not engineering. > Hence the need to get zeroes on the off-diagonal.
I don’t see why. 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]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
