Quote from jem:
you claimed top down cosmology did not require a multiverse because you were fooled by some link on wikipedia....
Now you come back to that ignorant statement.
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http://arxiv.org/PS_cache/hep-th/pdf/0602/0602091v2.pdf
as anyone who comprehends science can read in the abstract at the very front of the paper...
Abstract
We put forward a framework for cosmology that combines the string landscape with no boundary initial conditions. In this framework, amplitudes for
alternative histories for the universe are calculated with final boundary conditions only. This leads to a top down approach to cosmology, in which the
histories of the universe depend on the precise question asked. We study the
observational consequences of no boundary initial conditions on the landscape,
and outline a scheme to test the theory. This is illustrated in a simple model
landscape that admits several alternative inflationary histories for the universe.
Only a few of the possible vacua in the landscape will be populated. We also
discuss in what respect the top down approach differs from other approaches
to cosmology in the string landscape, like eternal inflation.