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Institute for Logic, Language and Computation

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13 November 2020, Meaning, Logic, and Cognition (MLC) Seminar, Julian Schlöder

Speaker: Julian Schlöder
Title: Fitch-like Paradoxes, the Dynamic Strategy
Date: Friday 13 November 2020
Time: 16:00-17:30
Location: Online, via Zoom

Abstract. *All truths are knowable* appears to entail that *all truths are known*; this is Fitch's paradox. Recent work has generalised the paradox; e.g. *all truths are believable* entails that *all beliefs are true* and *all knowledge is correctly assertible* entails that *all assertions are correct*. I suggest a general strategy to resolve such paradoxes. The suggestion is that "-able" should be understood dynamically with a backward-looking component. In case of the Fitch paradox, my suggestion is that *p is know-able* means that there is some act that, if executed, imparts the knowledge that *before the act was executed, p*. The modal flavour of such *-able* varies with what the relevant acts are (alethic = possible acts; deontic = permitted acts; etc). In the talk, I lay out the different "Fitch-like" problems, conceptually defend the dynamic/backward strategy (which I trace to the work of Dorothy Edgington on the Fitch paradox) and sketch the general a logical framework to implement this strategy.

Zoom link: https://uva-live.zoom.us/j/82405276346

For more information, see http://projects.illc.uva.nl/LoLa/MLC-Seminar/event/35164/ or contact Dean McHugh at .

Please note that this newsitem has been archived, and may contain outdated information or links.