On 10/27/2022 5:10 AM, John Clark wrote:
On Thu, Oct 27, 2022 at 12:23 AM Brent Meeker <[email protected]>
wrote:
>> Why would you believe the universe is ALWAYS lying to us?
Why do you believe the existence of dinosaur bones implies
that dinosaurs once existed?
/> It isn't "The Universe" that is producing this document. It's
some AI that Deutsch postulates is conscious, can measure a
quantum variable, erase the measurement, but remember that it knew
the value and writes a message saying so. Yeah, I'm sure that'll work/
Forget consciousness. You program a computer to make a measurement
about which slit an electron goes through, if the machine is able to
make the measurement you program it to produce a document saying it
has knowledge of which slit the electron went through but does not
state which slit that is, and you program the computer to then use
quantum erasure to get rid of that which-way information but to leave
the document intact.
But, as pointed out by Carroll in his explication of the delayed choice
quantum experiment, "...make the measurement you program it to produce a
document saying it has knowledge of which slit the electron went
through..." this can't be a real measurement, because that would imply a
record of it. If it done just by correlating with a quantum variable
that can be erased it's not a measurement. Deutsch's whole idea depends
on it being conscious of this measurement because that obfuscates what
can and can't be erased. It's trivial to hook up a machine that just
prints out "I measured it." every time an electron comes by; but then
how do you know whether it was really conscious? Do you believe in
immaterial consciousness that is distinct from the material intelligence
which knows things? You forget things and so you could measure
something and then remember you measured it but forget the value, but
you can't quantum erase the value measured...it just got decohered.
Brent
Every time you and many other people perform this experiment using
their own equipment and their own independently written program
interference bands are always seen and a document insisting that a
which-way measurement has been successfully completed is also always
seen. At this point a rational person would have to conclude that
either Many Worlds is correct or the universe is a liar. And if the
universe is a liar then it's time to give up on science.
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
0mo
0mo
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