On 8/7/2025 2:36 PM, John Clark wrote:
On Thu, Aug 7, 2025 at 4:49 PM Brent Meeker <[email protected]> wrote:
*>> I don't think the Heisenberg cut exists, I think
everything behaves quantum mechanically.*
>///Bohr's point was that there must be instruments and records
which behave classically, otherwise science is impossible; no one
could agree on observations./
*If you and I wouldn't agree on an observation then you and I must be
in different worlds, and so we never meet or contact each other in any
way. *
Or we're in a world where there's decoherence...a point I made but which
you elided to aid your rhetoric. If observations were quantum they
could exist in superpositions; and it's not that we'd disagree on the
observation, we'd agree that it had no definite value.
/> His position was that the Heisenberg cut has to exist. /
*He believed it must exist becauseotherwise things would be odd, not
paradoxical, just odd. But quantum mechanics is odd!*
He observed that the instruments and records that science, even the
science of quantum mechanics, relies on were not "odd". He also
recognized the quantum mechanics was odd. Something he could not have
done if there were not observations and records he could rely on.
/> surprisingly small things, like many biological molecules
behave classically./
*Yes if you're only interested in approximate behavior,but as the
years go by and our experimental techniques become more and more
sensitive those "small things" keep getting larger and larger. And now
it's up to 60 million atoms. *
But only if you're interest in collective behavior of Bose-Einstein
condensates. By the measure of collective behavior, superconducting
circuits exhibit quantum behavior of 1e17 atoms or more.
Citing the fact that we can detect quantum attributes of bigger and
bigger things is beside the point of my statement that even molecular
level things can behave classically. Some biological molecules need to
behave deterministically in order that life function consistently.
Brent
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