The problem lies with the notion of probability, he explains here that
it cannot refer to anything in the physics world as an exact statement:
https://www.youtube.com/watch?v=wfzSE4Hoxbc&t=1036s
That's then a problem for a fundamental theory of physics as such a
theory must refer to statements about nature that are exactly true.
Saibal
On 22-11-2022 01:08, Brent Meeker wrote:
He's wrong that frequentism does not empirically support probability
statements. He goes off on a tangent by referring to "other
gamblers". Nothing in physics is certain, yet Deutsch takes a bunch
of definite assertions and claims they alone are the real physics.
"The race is not always to the swift, nor the battle to the strong,
but that's the way to bet."
--- Damon Runyan
"In the Austin airport on the way to this meeting I noticed for sale
the October issue of a magazine called Astronomy, having on the cover
the
headline “Why You Live in Multiple Universes.” Inside I found a
report of
a discussion at a conference at Stanford, at which Martin Rees said
that
he was sufficiently confident about the multiverse to bet his dog’s
life on
it, while Andrei Linde said he would bet his own life. As for me, I
have
just enough confidence about the multiverse to bet the lives of both
Andrei
Linde and Martin Rees’s dog."
--- Steven Weinberg
Brent
On 11/20/2022 4:28 PM, Bruce Kellett wrote:
On Mon, Nov 21, 2022 at 2:52 AM smitra <[email protected]> wrote:
Probability cannot be a fundamental concept in physics as
explained
here:
https://www.youtube.com/watch?v=wfzSE4Hoxbc
I'm afraid Deutsch is a bit too glib in this lecture. He hasn't,
despite his best efforts, removed probability from physics. For
example, in quantum mechanics, he has not explained why, if one
measures the z-spin of a spin-half particle prepared in an
eigenstate of x-spin, one gets only one result -- either z-spin-up
or z-spin-down. If one has eliminated probability, one should be
able to explain which result one gets, and why. It is no solution to
say that with many-worlds, that both results are obtained by
disjoint copies of the experimenter. The experimenter is just one
copy, and one would have to explain the result for each individual
separately. Many worlds does not explain why I, for example, see
only z-spin-up and not z-spin-down. To make sense of that, we need a
viable concept of probability and the Born rule.
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/CAFxXSLQR4F3uEXO3HCPysF5Rwwr5x6NCOVZ5vk5wmiqu%2BWi8qw%40mail.gmail.com
[1].
--
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/ef67fea2-fbf8-6e1a-2b5b-3b5182515732%40gmail.com
[2].
Links:
------
[1]
https://groups.google.com/d/msgid/everything-list/CAFxXSLQR4F3uEXO3HCPysF5Rwwr5x6NCOVZ5vk5wmiqu%2BWi8qw%40mail.gmail.com?utm_medium=email&utm_source=footer
[2]
https://groups.google.com/d/msgid/everything-list/ef67fea2-fbf8-6e1a-2b5b-3b5182515732%40gmail.com?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/e77e1b82b1f376e022d74c9da341a941%40zonnet.nl.
