[ExI] Drake Equation Musings
anders at aleph.se
Fri May 20 16:42:49 UTC 2016
On 2016-05-20 13:59, BillK wrote:
> So you are agreeing with Carter's Weak Anthropic Principle that the
> universe's apparent fine tuning is the result of selection bias: i.e.
> only in a universe capable of eventually supporting life will there be
> living beings capable of observing and reflecting upon fine tuning.
> And this selection bias provides no information about the likelihood
> of life elsewhere in the universe.
Yes to the first, not necessarily the second. Selection biases can
produce very nontrivial effects (e.g. see my notes
As noted in Barrow and Tipler many aspects of the universe we see -
relative sizes of stars, animals and mountains - are tied together by
anthropics-related relations. A universe with a weaker anthropic
selection effect might have a bigger spread between things.
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