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  1. On the Logical Philosophy of Assertive Graphs.Daniele Chiffi & Ahti-Veikko Pietarinen - 2020 - Journal of Logic, Language and Information 29 (4):375-397.
    The logic of assertive graphs is a modification of Peirce’s logic of existential graphs, which is intuitionistic and which takes assertions as its explicit object of study. In this paper we extend AGs into a classical graphical logic of assertions whose internal logic is classical. The characteristic feature is that both AGs and ClAG retain deep-inference rules of transformation. Unlike classical EGs, both AGs and ClAG can do so without explicitly introducing polarities of areas in their language. We then compare (...)
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  • Springer Handbook of Model-Based Science: Edited by Lorenzo Magnani and Tommaso Bertolotti, Cham, Springer, 2017, Xl + 1179 Pp., ISBN 9783319305257, €298.Daniele Chiffi - 2019 - International Studies in the Philosophy of Science 32 (1):65-67.
    Volume 32, Issue 1, March 2019, Page 65-67.
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  • Abductive Inference Within a Pragmatic Framework.Daniele Chiffi & Ahti-Veikko Pietarinen - forthcoming - Synthese:1-17.
    This paper presents an enrichment of the Gabbay–Woods schema of Peirce’s 1903 logical form of abduction with illocutionary acts, drawing from logic for pragmatics and its resources to model justified assertions. It analyses the enriched schema and puts it into the perspective of Peirce’s logic and philosophy.
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  • On Assertion and Denial in the Logic for Pragmatics.Massimiliano Carrara, Daniele Chiffi & Ciro De Florio - 2017 - Journal of Applied Logic 25:S97-S107.
    The aim of this paper is twofold: First, we present and develop a system of logic for pragmatics including the act of denial. Second, we analyse in our framework the so-called paradox of assertability. We show that it is possible to yield sentences that are not assertable. Moreover, under certain conditions, a symmetric result can be obtained: There is a specular paradox of deniability. However, this paradox is based on the problematic principle of classical denial equivalence.
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  • Assertive Graphs.F. Bellucci, D. Chiffi & A.-V. Pietarinen - 2018 - Journal of Applied Non-Classical Logics 28 (1):72-91.
    Peirce and Frege both distinguished between the propositional content of an assertion and the assertion of a propositional content, but with different notational means. We present a modification of Peirce’s graphical method of logic that can be used to reason about assertions in a manner similar to Peirce’s original method. We propose a new system of Assertive Graphs, which unlike the tradition that follows Frege involves no ad hoc sign of assertion. We show that axioms of intuitionistic logic can be (...)
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  • Pragmatic Logics for Hypotheses and Evidence.Massimiliano Carrara, Daniele Chiffi & Ciro De Florio - forthcoming - Logic Journal of the IGPL.
    The present paper is devoted to present two pragmatic logics and their corresponding intended interpretations according to which an illocutionary act of hypothesis-making is justified by a scintilla of evidence. The paper first introduces a general pragmatic frame for assertions, expanded to hypotheses, ${\mathsf{AH}}$ and a hypothetical pragmatic logic for evidence ${\mathsf{HLP}}$. Both ${\mathsf{AH}}$ and ${\mathsf{HLP}}$ are extensions of the Logic for Pragmatics, $\mathcal{L}^P$. We compare ${\mathsf{AH}}$ and $\mathsf{HLP}$. Then, we underline the expressive and inferential richness of both systems in (...)
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