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RESEARCH ARTICLE
Investigation of Gettier Cases and Some Examples of Lehrer and Paxson in terms of Natural Deduction Method
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1 Bingöl Üniversitesi, Fen Edebiyat Fakültesi, Felsefe Bölümü 12000, Bingöl , Turkey
Received: 9 April 2021 | Published online: 22 May 2021
© 2021 by the Authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract
This study will focus on the examples in Edmund L. Gettier’s article titled “Is Justified True Belief Knowledge?”, which addresses two cases to draw our attention to the lack of a tripartite conception of knowledge, and on some examples in the article titled with “Knowledge: Undefeated Justified True Belief” by Keith Lehrer and Thomas Paxson who advocate one of the quadripartite conceptions of knowledge to overcome these shortcomings. Firstly, this study will try to determine what kind of natural deduction the examples in these articles are, then show whether these deductions are valid by using direct and indirect proving methods.
Keywords
Gettier
Lehrer
Paxson
natural deduction
direct proving
indirect proving.
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