Two Problems of Direct Inference

Erkenntnis 76 (3):299-318 (2012)
Abstract
The article begins by describing two longstanding problems associated with direct inference. One problem concerns the role of uninformative frequency statements in inferring probabilities by direct inference. A second problem concerns the role of frequency statements with gerrymandered reference classes. I show that past approaches to the problem associated with uninformative frequency statements yield the wrong conclusions in some cases. I propose a modification of Kyburg’s approach to the problem that yields the right conclusions. Past theories of direct inference have postponed treatment of the problem associated with gerrymandered reference classes by appealing to an unexplicated notion of projectability . I address the lacuna in past theories by introducing criteria for being a relevant statistic . The prescription that only relevant statistics play a role in direct inference corresponds to the sort of projectability constraints envisioned by past theories
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    Paul D. Thorn (2013). Defeasible Conditionalization. Journal of Philosophical Logic:1-20.
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    Paul D. Thorn (2013). Defeasible Conditionalization. Journal of Philosophical Logic:1-20.
    Mark Stone (1987). Kyburg, Levi, and Petersen. Philosophy of Science 54 (2):244-255.
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