ILLC-LIRa December 2018

illc-lira@list.uva.nl

1 participants
4 discussions

SYSMICS 2019 Conference: Syntax Meets Semantics
by LIRa Seminar 17 Dec '18

17 Dec '18

Dear all, The SYSMICS 2019 Conference: Syntax Meets Semantics will take place on 21-25 January 2019. Since some of the talks might be interesting to the LIRa audience, we forward the details below: The SYSMICS 2019 conference is the last of a series of meetings planned in the SYSMICS RISE project during 2016-2019. The program of the SYSMICS 2019 conference will focus on interactions between syntactic and semantic methods in substructural and other non-classical logics. Substructural logics are formal reasoning systems that refine classical logic by weakening structural rules in a Gentzen-style sequent calculus. Traditionally, non-classical logics have been investigated using proof theoretic and algebraic methods. In recent years, combined approaches has started to emerge, thus establishing new links with modal logic and other branches of logic. The scope of the conference includes but is not limited to algebraic, proof theoretic and relational approaches towards the study of non-classical logics. Date: 21-25 January 2019. Venue: University Library Singel, Doelenzaal (C0.07) and Belle van Zuylenzaal, Singel 425, 1012 WP, Amsterdam. Please find all details about the program here. To register to the conference, please follow the instructions at this link: SYSMICS 2019 Registration. Note that registration is free for ILLC members. Hope to see you there! The LIRa team

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LIRa Session: Jeroen de Ridder
by LIRa Seminar 12 Dec '18

12 Dec '18

Dear all, Tomorrow we will have our next LIRa session. Please, find the details below: Speaker: Jeroen de Ridder Date and Time: Thursday, December 13th 2018, 17:00-18:30 Venue: ILLC Seminar Room F1.15, Science Park 107. Title: Fake News Epistemology. Abstract. Fake news is all the rage these days. In this talk, I draw on contemporary social epistemology to explain what’s so bad about fake news from an epistemic perspective. I start by developing a characterization of fake news. Next, I investigate direct and indirect bad effects of fake news. Among the direct bad effects of fake news are obvious things like the inducement of false or misleading beliefs in those who consume it. Less obviously, fake news also has indirect effects on people who don’t consume it. It can give people misleading defeaters, decrease the reliability of one’s sources, and affect the modal environment of our beliefs, hence undermining their epistemic status. I then zoom out to explore the indirect bad effects of fake news on our epistemic environments in general. Fake news shifts more of the burden for acquiring beliefs with positive epistemic status to our own cognitive agency, thus making it harder for us to do well epistemically. Hope to see you there! The LIRa team

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LIRa Session: Jeroen de Ridder
by LIRa Seminar 07 Dec '18

07 Dec '18

Dear all, The next LIRa session will take place on Thursday, December 13th. Our speaker is Jeroen de Ridder. Please, find the details below: Speaker: Jeroen de Ridder Date and Time: Thursday, December 13th 2018, 17:00-18:30 Venue: ILLC Seminar Room F1.15, Science Park 107. Title: Fake News Epistemology. Abstract. Fake news is all the rage these days. In this talk, I draw on contemporary social epistemology to explain what’s so bad about fake news from an epistemic perspective. I start by developing a characterization of fake news. Next, I investigate direct and indirect bad effects of fake news. Among the direct bad effects of fake news are obvious things like the inducement of false or misleading beliefs in those who consume it. Less obviously, fake news also has indirect effects on people who don’t consume it. It can give people misleading defeaters, decrease the reliability of one’s sources, and affect the modal environment of our beliefs, hence undermining their epistemic status. I then zoom out to explore the indirect bad effects of fake news on our epistemic environments in general. Fake news shifts more of the burden for acquiring beliefs with positive epistemic status to our own cognitive agency, thus making it harder for us to do well epistemically. Hope to see you there! The LIRa team

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LIRa Session: Krzysztof Apt
by LIRa Seminar 05 Dec '18

05 Dec '18

Dear all, Tomorrow we will have our next LIRa session. Please, find the details below: Speaker: Krzysztof Apt Date and Time: Thursday, December 6th 2018, 17:00-18:30 Venue: ILLC Seminar Room F1.15, Science Park 107. Title: The logic of gossiping. Abstract. Gossip protocols are concerned with the spread of knowledge in a social network. They aim at arriving at a situation in which all agents know each other secrets. Recently distributed epistemic gossip protocols were introduced that employ epistemic logic (for instance in statements such as \'if I do not know whether agent i knows my secret I communicate it to him\'). To discuss such protocols we developed a simple epistemic logic that allows us to express statements like \'agent a knows that agent b is familiar with the secret of agent c.\' An analysis of such statements is surprisingly subtle. We show that the semantics and truth relation of this logic are decidable, which is relevant for the correctness study of the gossip protocols. Also, we discuss an extension allowing one to express common knowledge. Many questions remain open, notably sound and complete axiomatization. Further, there are several types of communication between pairs of agents, each resulting in a different notion of knowledge. The talk is based on joint works with Davide Grossi, Wiebe van der Hoek, and Dominik Wojtczak. Hope to see you there! The LIRa team

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ILLC-LIRa December 2018