“In all there are four arguments here for the multiverse: the failure of conventional methods for understanding why the cosmological constant is not large, the success of the environmental theories for doing so, the successful prediction of the nonzero cosmological constant, and the string landscape.”

—  Joseph Polchinski

[Why trust a theory? Some further remarks (part 1)., arXiv.org, 2016, http://arxiv.org/abs/1601.06145] (p. 4)

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Joseph Polchinski3
physicist working on string theory 1954–2018

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