Re: Universes...ad infinitum


"Jeffrey Goldberg" <nobody@xxxxxxxxxxxx> wrote in message
news:alpine.OSX.0.9999.0710221657550.797@xxxxxxxxxxxxxxx
In <471cf672$0$8414$db0fefd9@xxxxxxxxxxxxxx>, Lee wrote:

"Jeffrey Goldberg" <nobody@xxxxxxxxxxxx> wrote in message

The only reason we have to believe in many universes with different
physical constants is to solve the metaphysical problem of how fortunate
it is that there is any universe that is fit for life to develop in.

If it is true that there are multiple universes surely insisting that
they
have to be fine tuned to support earth type life does not allow for the
development other unfamiliar life forms.

I think that you have misunderstood what I said in two respects. First if
there are multiple universes with different physical constants or laws,
then we have to insist on nothing more. Most of those universes will
probably be unable to support the evolution of any kind of life (they
might not last long enough, the distribution of energy might not be
"lumpy" enough, etc). All we need is that at least one is capable of
providing the right among of constancy and change for evolution to do its
work.

Naturally, in any universe (or planet, or galaxy) in which evolution can
get a foothold, the life that evolves will match up very well to the
parameters of that environment. That's what evolution produces.

So for me the question of "how come the physical environment we see is so
closely tied to our kind of life" is like asking how come legs are so well
designed to wear trousers.

Assuming multiple universes (with different physics) gets us around
"explaining" the fact that the universe we live in has the right kind of
physics for some kind of life to evolve in.


Thanks, that is clearer.



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