The ¬K¬K rule and the structurally unknowable

Asian Journal of Philosophy 1 (1):1-11 (2022)
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Rosenkranz (2021) offered a logic and a detailed account of justification, according to which justification that p can be analyzed as a form of second-level ignorance: ¬K¬Kp. An intuition behind the analysis is that the justified subject has the potential, at least in a nearby world, to either come to know p or come to know ¬Kp. However, given Rosenkranz’s hyperintensional semantics for modeling knowledge states, we can always construct, out of an ¬K¬K-agent’s knowledge state, epistemic possibilities that prohibit the agent from having that potential. This shows that Rosenkranz’s analysis is still insufficient for carrying all the epistemic weight underlying the notion of justification. A better analysis would require a deeper look into an agent’s knowledge structure and its involved modalities, which could be a lot more complex than what the ¬K¬K rule tells us.



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Author Profiles

Yiwen Zhan
Beijing Normal University

Citations of this work

Replies to critics.Sven Rosenkranz - 2022 - Asian Journal of Philosophy 1 (1):1-6.
Précis of Justification as Ignorance.Sven Rosenkranz - 2022 - Asian Journal of Philosophy 1 (1):1-6.

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References found in this work

Blindspots.Roy A. Sorensen - 1988 - New York: Oxford University Press.
Justification as Ignorance: An Essay in Epistemology.Sven Rosenkranz - 2021 - Oxford, United Kingdom: Oxford University Press.
Blindspots.Roy Sorensen - 1990 - Mind 99 (393):137-140.

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