On 26 Feb 2013, at 23:51, meekerdb wrote:
On 2/26/2013 1:46 PM, John Mikes wrote:
Brent: forgive my weak 'brain': in the turmoil of BackAndForces on
this list it faded what you (really?) mean by
quasi classical physics
I mean the world model of Newton and Maxwell plus a little
randomness from QM: consisting of distinct objects in definite
locations, not wave functions in infinite dimensional Hilbert space.
brains
Biological information processors found within skulls.
and what 'ideas' is (your) 'comp' based on?
?? My comp?
I think whatever we 'experience' is a (fortunate?) anthropic
accident (incident?).
<I put (your) to comp, because I am not sure about Bruno's "IF
true" - and you did not refer to it either. >
Dinos? We know so little about the past of this world - even about
not-so ancient HUMAN past (Dravidians) so infulential into our
present world. Or how the Simians straightened up their spine to
become human? (I am in favor of the 'aequatic ape' dream). And
others.
Dinosaurs were just an example. I wondered what Bruno meant by
saying we were here from the beginning.
I am not sure having said that. I might have mean this in the
arithmetical ontological sense perhaps. If you find the quote I can
say more.
Was he denying there was a pre-human past?
Certainly not. The prehuman-past is quite plausible, but it is not
something absolute. It is something relative to many computations,
which exists out of time and space.
I hope you are not talking about TOE derived at Dino-time, or later.
(BTW: was a neuron of a dino bigger than that of today's mouse?
With what size atoms? I asked this questions from many bio-people
over the past 50 years - no answer so far.
Some of them were certainly longer.
Isaac Asimov once speculated that the size of dinosaurs was limited
because the larger an animal the faster it can run, but dinosaurs
had unmylenated neurons (like those in our brains) which are quite
slow in transmitting signals. So when a dinosaur got very big he
could run off a cliff right in front of him because the signal from
his eyes to brain to feet would propagate more slowly than his
forward motion. :-)
Lol,
Bruno
Brent
Maybe the Savants of this list can answer it?)
JM
On Tue, Feb 26, 2013 at 4:03 PM, meekerdb <[email protected]>
wrote:
On 2/26/2013 4:50 AM, Bruno Marchal wrote:
That does not work. We belong automatically to an infinity of
computations. With comp, the physical reality is unique, and
derivable from 0, s, + and * (and the usual axioms). But cosmos or
branch of a multiverse can be numerous, but before they
differentiated, we are in all of them.
That raises questions like, "Where were we when dinosaurs roamed
the Earth?" Or more generally does the physics of every universe
consistent with comp include quasi-classical physics? It seems
that it is necessary for brains to exist and to have the ideas on
which comp is based. Are we to regard this as just a fortunate
anthropic accident?
Brent
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