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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/219703
A hyperintensional approach to positive epistemic possibility
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The received view says that possibility is the dual of necessity: a proposition is (meta-
physically, logically, epistemically etc.) possible iff it is not the case that its negation
is (metaphysically, logically, epistemically etc., respectively) necessary. This reading
is usually taken for granted by modal logicians and indeed seems plausible when
dealing with logical or metaphysical possibility. But what about epistemic possibil-
ity? We argue that the dual definition of epistemic possibility in terms of epistemic
necessity generates tension when reasoning about non-idealized agents and is a prob-
lem of concern for most hyperintensional epistemic logics that alleviate the problem
of logical omniscience. The tension is particularly evident when knowledge is taken
as a primitive to define other epistemic concepts, such as justification and belief, as
done in the knowledge-first tradition. We propose a non-dual interpretation of epis-
temic possibility, employing a hyperintensionality filter similar to the one that makes
the corresponding epistemic necessity operator hyperintensional. We employ the pro-
posed semantics to model Stalnaker’s belief as epistemic possibility of knowledge
and provide a sound and complete axiomatization for a hyperintensional version of
his bimodal logic of knowledge and belief
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ROSSI, Niccolò, OGUN, Aybuke. A hyperintensional approach to positive epistemic possibility. _Synthese_. 2023. Vol. 202. [consulta: 2 de febrer de 2026]. ISSN: 0039-7857. [Disponible a: https://hdl.handle.net/2445/219703]