Knowability as De Re Modality: A Certain Solution to Fitch Paradox
Knowability as De Re Modality: A Certain Solution to Fitch Paradox
Author(s): Tomasz Jarmużek, Krzysztof Krawczyk, Rafał PalczewskiSubject(s): Philosophy, Logic
Published by: Towarzystwo Naukowe KUL & Katolicki Uniwersytet Lubelski Jana Pawła II
Keywords: anti-realism; de dicto modality; de re modality; epistemic logic; Fitch Paradox; knowability logic; knowability principle; modal logic; tableaux methods
Summary/Abstract: In the paper, we try to find a new, intuitive solution to the Fitch paradox. We claim that traditional expression of Knowability Principle (p → ◊Kp) is based on erroneous understanding of knowability as de dicto modality. Instead, we propose to understand knowability as de re modality. In the paper we present the minimal logic of knowability in which Knowability Principle is valid, but Fitch Paradox does not hold anymore. We characterize the logic semantically as well as by an axiomatic and tableaux procedure approach.
Journal: Roczniki Filozoficzne
- Issue Year: 68/2020
- Issue No: 4
- Page Range: 291-313
- Page Count: 22
- Language: English