On 18 Jan 2015, at 20:39, meekerdb wrote:
On 1/18/2015 6:26 AM, Bruno Marchal wrote:
Like 0 universe, 1 universe, 2 universe, ... aleph_0 universes,
aleph_1 universes, etc.
We need faith to believe in anything different from our own
consciousness here-and-now.
But our perception (part of our consciousness) provides evidence for
1 universe.
?
No, only for a universe. Not one. On the contrary, the evidence is
that each big things we tought could be one, appears to be multiple:
one earth => many planets, one solar system => many stars, one galaxy
==> many galaxies, one cluster of galaxies, many cluster of
galaxies, ... "One universe" is already a strong metaphysical
assumption.
It is disingenuous to pretend it's just an arbitrary choice of
"faith".
It would be slightly disingenuous if that was for *a* physical
reality, but for one, or any number, you will need an act of faith.
With the Löbian machine, you are right, strictly speaking: their
belief in *a* model, would be equivalent to a belief in their
consistency (by Gödel completeness), which they cannot justify from
their beliefs (amazingly enough, by incompleteness), so yes, the
belief in a reality is already close to an act of faith. In our brain,
the machinery of that act of faith is probably hardwired, so a part of
our consciousness relies on some amount of hardwired theology (making
the subject difficult as we have to learn to doubt about hardwired
millions of years old prejudices: but that is exactly what science is
supposed to do.
Bruno
Brent
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