The logic of justification

Review of Symbolic Logic 1 (4):477-513 (2008)
Abstract
We describe a general logical framework, Justification Logic, for reasoning about epistemic justification. Justification Logic is based on classical propositional logic augmented by justification assertions t: F that read t is a justification for F. Justification Logic absorbs basic principles originating from both mainstream epistemology and the mathematical theory of proofs. It contributes to the studies of the well-known Justified True Belief vs. Knowledge problem. We state a general Correspondence Theorem showing that behind each epistemic modal logic, there is a robust system of justifications. This renders a new, evidence-based foundation for epistemic logic. As a case study, we offer a resolution of the GoldmanRed Barns in Justification Logic. Furthermore, we formalize the well-known Gettier example and reveal hidden assumptions and redundancies in Gettier’s reasoning
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    Citations of this work BETA
    Melvin Fitting (2011). Reasoning About Games. Studia Logica 99 (1-3):143-169.
    Melvin Fitting (2009). Realizations and LP. Annals of Pure and Applied Logic 161 (3):368-387.

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