Uncertainty and probability for branching selves

Abstract
Everettian accounts of quantum mechanics entail that people branch; every possible result of a measurement actually occurs, and I have one successor for each result. Is there room for probability in such an account? The prima facie answer is no; there are no ontic chances here, and no ignorance about what will happen. But since any adequate quantum mechanical theory must make probabilistic predictions, much recent philosophical labor has gone into trying to construct an account of probability for branching selves. One popular strategy involves arguing that branching selves introduce a new kind of subjective uncertainty. I argue here that the variants of this strategy in the literature all fail, either because the uncertainty is spurious, or because it is in the wrong place to yield probabilistic predictions. I conclude that uncertainty cannot be the ground for probability in Everettian quantum mechanics.
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    References found in this work BETA
    David Deutsch (1999). Quantum Theory of Probability and Decisions. Proceedings of the Royal Society of London:3129--37.
    Hilary Greaves (2004). Understanding Deutsch's Probability in a Deterministic Universe. Studies in History and Philosophy of Modern Physics 35 (3):423-456.
    David Lewis (1976). Survival and Identity. In Amelie Oksenberg Rorty (ed.), The Identities of Persons. University of California Press. 17-40.

    View all 11 references

    Citations of this work BETA
    David Baker (2007). Measurement Outcomes and Probability in Everettian Quantum Mechanics. Studies in History and Philosophy of Science Part B 38 (1):153-169.
    Christina Conroy (2012). The Relative Facts Interpretation and Everett's Note Added in Proof. Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 43 (2):112-120.
    Simon Saunders & D. Wallace (2008). Branching and Uncertainty. British Journal for the Philosophy of Science 59 (3):293-305.

    View all 8 citations

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