> On 17 May 2020, at 11:39, 'scerir' via Everything List > <everything-list@googlegroups.com> wrote: > > I vaguely remember that von Weizsaecker wrote (in 'Zeit und Wissen') that > probability is 'the expectation value of the relative frequency'. > >
That is the frequency approach to probability. Strictly speaking it is false, as it gives the wrong results for the “non normal history” (normal in the sense of Gauss). But it works retire well in the normal world (sorry for being tautological). At its antipode, there is the bayesian “subjective probabilities”, which makes sense when complete information is available . So it does not make sense in many practical situation. Remark: the expression “subjective probabilities” is used technically for this Bayesian approach, and is quite different from the first person indeterminacy that Everett call “subjective probabilities”. The “subjective probabilities” of Everett are “objective probabilities”, and can be defined trough a frequency operator in the limit. The same occur in arithmetic, where the subjective (first person) probabilities are objective (they obey objective, sharable, laws). Naïve many-worlds view are not sustainable, but there is no problem with consistent histories, and 0 worlds. Bruno >> Bruce wrote: >> >> It is this subjectivity, and appeal to Bayesianism, that I reject for QM. I >> consider probabilities to be intrinsic properties -- not further analysable. >> In other words, I favour a propensity interpretation. Relative frequencies >> are the way we generally measure probabilities, but they do not define them. >> >> >> > > > -- > 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 everything-list+unsubscr...@googlegroups.com > <mailto:everything-list+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/1520643804.753400.1589708343624%40mail1.libero.it > > <https://groups.google.com/d/msgid/everything-list/1520643804.753400.1589708343624%40mail1.libero.it?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 everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/903D4D8D-7D3F-4F8D-B399-4675DA2160D0%40ulb.ac.be.
