We observe some puzzling linguistic data concerning ordinary knowledge ascriptions that embed an epistemic (im)possibility claim. We conclude that it is untenable to jointly endorse both classical logic and a pair of intuitively attractive theses: the thesis that knowledge ascriptions are always veridical and a ‘negative transparency’ thesis that reduces knowledge of a simple negated ‘might’ claim to an epistemic claim without modal content. We motivate a strategy for answering the trade-off: preserve veridicality and (generalized) negative transparency, while abandoning the general validity of contraposition. We survey and criticize various approaches for incorporating veridicality into domain semantics, a paradigmatic ‘information-sensitive’ framework for capturing negative transparency and, more generally, the non-classical behavior of sentences with epistemic modals. We then present a novel information-sensitive semantics that successfully executes our favored strategy: stable acceptance semantics.
|Title of host publication||Proceedings Ninetheenth conference on Theoretical Aspects of Rationality and Knowledge (TARK 2023)|
|Number of pages||13|
|Publication status||Published - 11 Jul 2023|
|Event||19th Conference on Theoretical Aspects of Rationality and Knowledge, TARK 2023 - Oxford, United Kingdom|
Duration: 28 Jun 2023 → 30 Jun 2023
|Name||Electronic Proceedings in Theoretical Computer Science, EPTCS|
|Publisher||Open Publishing Association|
|Conference||19th Conference on Theoretical Aspects of Rationality and Knowledge, TARK 2023|
|Period||28/06/23 → 30/06/23|
Bibliographical notePublisher Copyright:
© Peter Hawke.