•  25
    A Hyperintensional Logic of Non-prime Evidence
    Journal of Philosophical Logic 53 (3): 761-788. 2024.
    We present a logic of evidence that reduces agents’ epistemic idealisations by combining classical propositional logic with substructural modal logic for formulas in the scope of epistemic modalities. To this aim, we provide a neighborhood semantics of evidence, which provides a modal extension of Fine’s semantics for relevant propositional logic. Possible worlds semantics for classical propositional logic is then obtained by defining the set of possible worlds as a special subset of information…Read more
  •  13
    Relevant Reasoning and Implicit Beliefs
    In Helle Hvid Hansen, Andre Scedrov & Ruy J. G. B. De Queiroz (eds.), Logic, Language, Information, and Computation: 29th International Workshop, WoLLIC 2023, Halifax, NS, Canada, July 11–14, 2023, Proceedings, Springer Nature Switzerland. pp. 336-350. 2023.
    Combining relevant and classical modal logic is an approach to overcoming the logical omniscience problem and related issues that goes back at least to Levesque’s well known work in the 1980s. The present authors have recently introduced a variant of Levesque’s framework where explicit beliefs concerning conditional propositions can be formalized. However, our framework did not offer a formalization of implicit belief in addition to explicit belief. In this paper we provide such a formalization.…Read more
  •  10
    Epistemic Logics for Relevant Reasoners
    Journal of Philosophical Logic 53 (5): 1383-1411. 2024.
    We present a neighbourhood-style semantic framework for modal epistemic logic modelling agents who process information using relevant logic. The distinguishing feature of the framework in comparison to relevant modal logic is that the environment the agent is situated in is assumed to be a classical possible world. This framework generates two-layered logics combining classical logic on the propositional level with relevant logic in the scope of modal operators. Our main technical result is a ge…Read more