Abstract
We suggest that, contrary to what is sometimes stated, the only way we can make reliable statements about history, using information available at the present, is to use unitary evolution backwards in time. We give some discussion of how this might work in practice, and point out that additional inputs, e.g. certain prejudices, are also required.
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Squires, E.J. History and many-worlds quantum theory. Found Phys Lett 5, 279–290 (1992). https://doi.org/10.1007/BF00692804
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DOI: https://doi.org/10.1007/BF00692804