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arXiv · 2006.15750

Access-based Intuitionistic Knowledge

Steffen Lewitzka
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Abstract

We introduce the concept of access-based intuitionistic knowledge which relies on the intuition that agent $i$ knows $φ$ if $i$ has found access to a proof of $φ$. Basic principles are distribution and factivity of knowledge as well as $\squareφ\rightarrow K_iφ$ and $K_i(φ\veeψ) \rightarrow (K_iφ\vee K_iψ)$, where $\squareφ$ reads `$φ$ is proved'. The formalization extends a family of classical modal logics designed in [Lewitzka 2015, 2017, 2019] as combinations of $IPC$ and $CPC$ and as systems for the reasoning about proof, i.e. intuitionistic truth. We adopt a formalization of common knowledge from [Lewitzka 2011] and interpret it here as access-based common knowledge. We compare our proposal with recent approaches to intuitionistic knowledge [Artemov and Protopopescu 2016; Lewitzka 2017, 2019] and bring together these different concepts in a unifying semantic framework based on Heyting algebra expansions.

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Steffen Lewitzka. 2020-06-29. Access-based Intuitionistic Knowledge. https://doi.org/10.1093/logcom%2Fexaa086

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