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What will the earliest preservation date of any resuscitated cryonics patient be?


One of the most commonly voiced criticisms against cryonics is the argument that current cryonics practices don't preserve enough information to make resuscitated possible (Hendricks 2015). Cryonics organisations disagree.

To shed more light on the question, it is thus asked:

What will the earliest preservation date of any cryonics patient resuscitated or emulated before 2200 be?


  • This question resolves as the earliest cryopreservation date of any cryonics patient to have been resuscitated or emulated before 2200.

  • This question resolves ambiguous if no cryonics patient is successfully resuscitated or emulated before December 1st, 2200.

  • For the purpose of this question, we define a cryonics patient as a person who has cryopreserved for at least 1 year.

  • For the purpose of this question, emulation is defined by the success criteria of this question.

  • To be successfully resuscitated, the patient must be determined by at least three recognized medical experts (M.D. or PhD in Biology, Neuroscience or equivalent level of education), each of whom is independent of the cryonics organisation responsible for the patient, to be conscious, alert and responsive to questions for at least 12 hours at some point within a year and a day after midnight on the date that the attempt to revive them is made. Should the successful revival be startlingly obvious (to be judged by the metaculus community at large), these conditions need not be fulfilled.

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