Limits in testing the Multiverse - a podcast by MCMP Team

George Ellis (Cape Town) gives a talk at the Workshop on "Why trust a Theory?" (7-9 December, 2015) titled "Limits in testing the Multiverse". Abstract: Our ability to test cosmological models is severely constrained by visual horizons on the one hand, and physical horizons (limits on testing physical theories) on the other. Various arguments have been given to get round these limitations. I will argue that these amount to philosophical choices, which may or may not correspond to physical reality, and hence resulting claims do not amount to established scientific results. This holds in particular to a variety of claims of physical existence of infinities of galaxies, universes, or beings like ourselves in a multiverse. We need a strong philosophical stance to distinguish which of these claims should indeed be regarded as proven science,and which not.

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