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367Infinite Opinion Sets and Relative AccuracyJournal of Philosophy 120 (6): 285-313. 2023.We can have credences in an infinite number of propositions—that is, our opinion set can be infinite. Accuracy-first epistemologists have devoted themselves to evaluating credal states with the help of the concept of ‘accuracy’. Unfortunately, under several innocuous assumptions, infinite opinion sets yield several undesirable results, some of which are even fatal, to accuracy-first epistemology. Moreover, accuracy-first epistemologists cannot circumvent these difficulties in any standard way. I…Read more
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78Simultaneous belief updates via successive Jeffrey conditionalizationSynthese 190 (16): 3511-3533. 2013.This paper discusses simultaneous belief updates. I argue here that modeling such belief updates using the Principle of Minimum Information can be regarded as applying Jeffrey conditionalization successively, and so that, contrary to what many probabilists have thought, the simultaneous belief updates can be successfully modeled by means of Jeffrey conditionalization.
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75Rescuing ReflectionPhilosophy of Science 79 (4): 473-489. 2012.In this article, I suggest an argument that seems to show a conflict between the reflection principle and conditionalization. In particular, I show that when the reflection principle is formulated in a standard way, the principle conflicts with Jeffrey conditionalization. And it is argued that the source of the conflict resides in an ambiguity of the standard formulation. Furthermore, I attempt to rescue the principle using Bayes factors. That is, I suggest a new formulation of the principle so …Read more
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72Confirmation measures and collaborative belief updatingSynthese 191 (16): 3955-3975. 2014.There are some candidates that have been thought to measure the degree to which evidence incrementally confirms a hypothesis. This paper provides an argument for one candidate—the log-likelihood ratio measure. For this purpose, I will suggest a plausible requirement that I call the Requirement of Collaboration. And then, it will be shown that, of various candidates, only the log-likelihood ratio measure \(l\) satisfies this requirement. Using this result, Jeffrey conditionalization will be refor…Read more
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55Correcting credences with chancesSynthese 198 (1): 509-536. 2018.Lewis’s Principal Principle is widely recognized as a rationality constraint that our credences should satisfy throughout our epistemic life. In practice, however, our credences often fail to satisfy this principle because of our various epistemic limitations. Facing such violations, we should correct our credences in accordance with this principle. In this paper, I will formulate a way of correcting our credences, which will be called the Adams Correcting Rules and then show that such a rule yi…Read more
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34Evidence and the epistemic betternessSynthese 202 (4): 1-25. 2023.It seems intuitive that our credal states are improved if we obtain evidence favoring truth over any falsehood. In this regard, Fallis and Lewis have recently provided and discussed some formal versions of such an intuition, which they name ‘the Monotonicity Principle’ and ‘Elimination’. They argue, with those principles in hand, that the Brier rule, one of the most popular rules of accuracy, is not a good measure, and that accuracy-firsters cannot underwrite both probabilism and conditionalizat…Read more
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8Dutch Book Arguments for Epistemic OptimismCHUL HAK SA SANG - Journal of Philosophical Ideas 86 (86): 229-263. 2022.
Ilho Park
Jeonbuk National University
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Jeonbuk National UniversityProfessor