An enhanced model for Rosenkranz’s logic of justification

Asian Journal of Philosophy 1 (1):1-9 (2022)

Abstract

Rosenkranz devised two bimodal epistemic logics: an idealized one and a realistic one. The former is shown to be sound with respect to a class of neighborhood frames called i-frames. Rosenkranz designed a specific i-frame able to invalidate a series of undesired formulas, proving that these are not theorems of the idealized logic. Nonetheless, an unwanted formula and an unwanted rule of inference are not invalidated. Invalidating the former guarantees the distinction between the two modal operators characteristic of the logic, while invalidating the latter is crucial in order to deal with the problem of logical omniscience. In this paper, I present an i-frame able to invalidate all the undesired formulas already invalidated by Rosenkranz, together with the missing formula and rule of inference.

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Niccolò Rossi
Universitat de Barcelona

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Citations of this work

Replies to Critics.Sven Rosenkranz - 2022 - Asian Journal of Philosophy 1 (1).
Précis of Justification as Ignorance.Sven Rosenkranz - 2022 - Asian Journal of Philosophy 1 (1).

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