| There are other multiverses with other worlds, but we have access to only this one. |
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| To be sure, a few philosophers have touted the putative merits of multiverses. |
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| He points out that, in most models, if you have inflation, you also get multiverses. |
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| The only context in which QM enters is that the theory allows, but does not require, the possibility of multiverses. |
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| He also summarizes string theory, the expansionary model of the universe, and the notion of multiverses. |
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| Some physicists feel uncomfortable about the theory that a particle has no single history, a theory that is crucial to the concept of multiverses as presently formulated. |
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