----- Original Message -----
From: ""Hal Finney"" <hal.domain.name.hidden>
To: <everything-list.domain.name.hidden>
Sent: Wednesday, July 26, 2006 08:28 AM
Subject: Re: Interested in thoughts on this excerpt from Martin Rees
> The real problem is not just that it is a philosophical speculation,
> it is that it does not lead to any testable physical predictions.
> The string theory landscape, even if finite, is far too large for
> systematic exploration. Our ideas, with an infinite number of possible
> universes, are even worse. Physicists see acceptance of anthropic
> explanations as the end of physics because there is no way to make
> quantitative predictions when there are so many degrees of freedom.
>
I'm not so sure that our ideas are worse. If you read some recent articles,
e.g.:
http://arxiv.org/abs/astro-ph/0607227
you see that they haven't really formulated rigorous theories about measure,
probabilities etc. of the multiverse. It's still very much in the
"handwaving" stage.
Saibal
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Received on Wed Jul 26 2006 - 21:50:24 PDT