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  1. Frank Zenker & Carlo Proietti (forthcoming). Editors' Introduction: Social Dynamics and Collective Rationality. Synthese:1-6.
    We provide a brief introduction to this special issue on social dynamics and collective rationality, and summarize the gist of the papers collected therein.
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  2. Roberto Ciuni & Carlo Proietti (2013). The Abundance of the Future. A Paraconsistent Approach to Future Contingents. Logic and Logical Philosophy 22 (1):21-43.
    Supervaluationism holds that the future is undetermined, and as a consequence of this, statements about the future may be neither true nor false. In the present paper, we explore the novel and quite different view that the future is abundant: statements about the future do not lack truth-value, but may instead be glutty, that is both true and false. We will show that (1) the logic resulting from this “abundance of the future” is a non-adjunctive paraconsistent formalism based on subvaluations, (...)
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  3. Carlo Proietti & Erik J. Olsson (2013). A DDL Approach to Pluralistic Ignorance and Collective Belief. Journal of Philosophical Logic:1-17.
    A group is in a state of pluralistic ignorance (PI) if, roughly speaking, every member of the group thinks that his or her belief or desire is different from the beliefs or desires of the other members of the group. PI has been invoked to explain many otherwise puzzling phenomena in social psychology. The main purpose of this article is to shed light on the nature of PI states – their structure, internal consistency and opacity – using the formal apparatus (...)
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  4. Carlo Proietti (2012). Intuitionistic Epistemic Logic, Kripke Models and Fitch's Paradox. Journal of Philosophical Logic 41 (5):877-900.
    The present work is motivated by two questions. (1) What should an intuitionistic epistemic logic look like? (2) How should one interpret the knowledge operator in a Kripke-model for it? In what follows we outline an answer to (2) and give a model-theoretic definition of the operator K. This will shed some light also on (1), since it turns out that K, defined as we do, fulfills the properties of a necessity operator for a normal modal logic. The interest of (...)
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  5. Carlo Proietti & Gabriel Sandu (2010). Fitch's Paradox and Ceteris Paribus Modalities. Synthese 173 (1):75 - 87.
    The paper attempts to give a solution to the Fitch’s paradox though the strategy of the reformulation of the paradox in temporal logic, and a notion of knowledge which is a kind of ceteris paribus modality. An analogous solution has been offered in a different context to solve the problem of metaphysical determinism.
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  6. Carlo Proietti (2008). Natural Numbers and Infinitesimals: A Discussion Between Benno Kerry and Georg Cantor. History and Philosophy of Logic 29 (4):343-359.
    During the first months of 1887, while completing the drafts of his Mitteilungen zur Lehre vom Transfiniten, Georg Cantor maintained a continuous correspondence with Benno Kerry. Their exchange essentially concerned two main topics in the philosophy of mathematics, namely, (a) the concept of natural number and (b) the infinitesimals. Cantor's and Kerry's positions turned out to be irreconcilable, mostly because of Kerry's irremediably psychologistic outlook, according to Cantor at least. In this study, I will examine and reconstruct the main points (...)
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