  Susskind claims in his recent book The Cosmic Landscape that evidence for the
existence and nature of `pocket universes' in a multiverse would be available
in the detailed nature of the Cosmic Blackbody Background Radiation that
constantly bathes all parts of our observable universe. I point out that
acceptance of the complex chain of argument involved does not imply possible
experimental verification of multiverses at the present time. Rather this claim
relates only to theoretically possible observations in the very far future of
the universe.
