Two proof-systems P and P* are said to be complementary when one proves exactly the non-theorems of the other. Complementary systems come as a particular kind of refutation calculi whose patterns of inference always work by inferring unprovable conclusions form unprovable premises. In the first part of my talk, I will focus on LK*, the sequent system complementing Gentzen’s system LK for classical logic. I will show, then, how to enrich LK* with two admissible (unary) cut rules, which allow for a simple and efficient cut-elimination algorithm. In particular, two facts will be highlighted: 1) for any given provable sequent, complementary cut-elimination always returns one of its simplest proofs, and 2) provable LK* sequents turn out to be “deductively polarized” by the empty sequent. In the second part, I will observe how an alternative complementary sequent system can be obtained by slightly modifying the Gentzen-Schütte system G3. I will finally show how this move could pave the way for a novel approach to multi-valuedness and proof-theoretic semantics for classical logic.
Propositional dynamic logic (PDL) is a framework for reasoning about nondeterministic program executions (or, more generally, nondeterministic actions). In this setting, nondeterminism is taken as a primitive: a program is nondeterministic iff it has multiple possible outcomes. But what is the sense of “possibility” at play here? This talk explores an epistemic interpretation: working in an enriched logical setting, we represent nondeterminism as a relationship between a program and an agent deriving from the agent’s (in)ability to adequately measure the dynamics of the program execution. More precisely, using topology to capture the observational powers of an agent, we define the nondeterministic outcomes of a given program execution to be those outcomes that the agent is unable to rule out in advance. In this framework, determinism coincides exactly with continuity: that is, determinism is continuity in the observation topology. This allows us to embed PDL into (dynamic) topological (subset space) logic, laying the groundwork for a deeper investigation into the epistemology (and topology) of nondeterminism.
The seminar is concerned with applying formal methods to fundamental issues, with an emphasis on probabilistic reasoning, decision theory and games. In this context “logic” is broadly interpreted as covering applications that involve formal representations. The topics of interest have been researched within a very broad spectrum of different disciplines, including philosophy (logic and epistemology), statistics, economics, and computer science. The seminar is intended to bring together scholars from different fields of research so as to illuminate problems of common interest from different perspectives. Throughout each academic year, meetings are regularly presented by the members of the seminar and distinguished guest speakers.
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02/08/2019 Faculty House, Columbia University
4:00 PM
03/29/2019 Faculty House, Columbia University
4:00 PM
04/19/2018 Faculty House, Columbia University
4:00 PM
The New York City Wittgenstein Workshop has the following workshops scheduled for this semester and more planned workshops to be announced soon.
All workshops are on Fridays from 4 to 6 pm in room D1106.
2/22 — Zed Adams (the New School) — History of the digital/analogue distinction in philosophy
4/19 — Nickolas Pappas (CUNY) — “Plato on the Opposite of Philosophy”
4/26 — Larry Jackson
5/03 — Nuno Venturinha (Nova University of Lisbon) — “Autobiographical Writing, Self-knowledge, and the Religious Point of View.”
5/10 — Pierre-Jean Renaudi (Lyon)
The REC is a pre-read conference. The papers will be made available on April 15.
Friday, May 3, 2019
1:30 – 3:15 pm
Alex Byrne (MIT)
Chair: TBD
Coffee Break
3:45 – 5:30 pm
Susanna Rinard (Harvard)
Chair: TBD
Dinner
7:30 – 9:15 pm
Jonathan Kvanvig (Washington University St Louis)
Chair: TBD
Reception 9:30 – 11:00 PM
Saturday, May 4, 2019
9:30 – 11:15 am
Anil Gupta (University of Pittsburgh)
Chair: TBD
Coffee Break
11:45 – 1:30 pm Winner of the Young Epistemologist Prize
TBD
Chair: TBD
Lunch
2:45 – 4:30 pm
Maria Lasonen-Aarnio (University of Helsinki)
Chair: TBD
Discussants
Heather Battaly (University of Connecticut)
John Bengson (University of Wisconsin-Madison)
Annalisa Coliva (University of California Irvine)
Thomas Kelly (Princeton)
Participants
Chris Copan, Andy Egan, Megan Feeney, Peter Klein, Matthew McGrath, Susanna Schellenberg, Ernie Sosa
The REC is a pre-read conference, so papers are to be read in advance. There is no registration fee for the conference, but please notify Megan Feeney, the conference manager, if you plan to attend by sending an email to rutgersepistemologyconference@gmail.com. If you wish to participate in the meals, please send a check made out to “Rutgers University” to Megan Feeney by April 15 ($80 if you are a faculty member or a postdoc; $60 if you are a graduate student or an undergraduate): Megan Feeney; Rutgers Epistemology Conference; 106 Somerset St, 5th Floor; New Brunswick, NJ 08901.
Critique is an assertion of values pitted against a state of affairs. To say that things should not be the way they are–to respond to questions such as ‘Why do I think this political or economic arrangement is wrong (and why should I care?)?’ implies an ethical stance. Critique thus draws together fact and value, domains that a long tradition of moral thought has argued exist on distinct planes. For there are dimensions of political life that are incomprehensible without this conjunction between ethical motivations and social realities. But if they are to have political consequences, such questions cannot be confined to private introspection. Scale matters. This talk looks at the articulation between everyday interactions and social movements to show the interplay among the first, second, and third person stances that characterize ethical life. Drawing ethnographic examples from American feminism and Vietnamese Marxism, it considers some of the ways in which ethical intuitions emerge, consolidate, and change, and argues that objectifications and the reflexivity they facilitate help give ethical life a social history.
This essay tries to develop a “black radical Kantianism” – that is, a Kantianism informed by the black experience in modernity. After looking briefly at socialist and feminist appropriations of Kant, I argue that an analogous black radical appropriation should draw on the distinctive social ontology and view of the state associated with the black radical tradition. In ethics, this would mean working with a (color-conscious rather than colorblind) social ontology of white persons and black sub-persons and then asking what respect for oneself and others would require under those circumstances. In political philosophy, it would mean framing the state as a Rassenstaat (a racial state) and then asking what measures of corrective justice would be necessary to bring about the ideal Rechtsstaat.
Response by César Cabezas Gamarra.
Presented by the German Idealism Workshop
Conference Schedule
10AM Teddy Seidenfeld – Conditional Probability, Conditionalization, and Total Evidence
11AM Eleonora Cresto – Beyond Indeterminate Utilities. The Case of Neurotic Cake-Cutting
11:20AM Ignacio Ojea Quintana – Unawareness and Levi’s Consensus as Common Ground
11:40AM Rush Stewart – Uncertainty, Equality, Fraternity
1PM Nils-Eric Sahlin – Levi’s Decision Theory: Lessons Learned
1:45PM Wilfried Sieg – Scientific Theories as Set-Theoretic Predicates?
2:45PM Panel Discussion – Learning from Levi
Abstracts available in attached documents under “Supporting material.”
Memorial
A memorial service will be held at 5PM at St. Paul’s Chapel on the Columbia campus. Reception to follow on the 7th floor of Philosophy Hall.
In 1804 Schelling diagnosed our impending “annihilation of nature” due to our conceptual detachment from and consequent economic exploitation of our natural world. His critique of Modernity’s Cartesian Idealisms, effected through his inversion of the Kantian categories, results in a philosophical project whose relevance to our ongoing climate crisis is difficult to overstate.
Bruce Matthews
Bard College/BHSEC, professor of philosophy, research in German Idealism and Romanticism, with a focus on life and thought of F.W.J. Schelling, whose recent work revolves around Schelling’s critique of modernity with its anticipation of, as he wrote in 1804, ‘the annihilation of nature,’ and its relevance to the Anthropocene.
“Schelling in the Anthropocene: A New Mythology of Nature,” (Symposium: Canadian Journal of Continental Philosophy, 2015), “Schelling: A Brief Biographical Sketch of the Odysseus of German Idealism,” in The Palgrave Handbook to German Idealism (2014), and “The New Mythology: Between Romanticism and Humanism,” in The Relevance of Romanticism (Cambridge University Press, 2014). Books include the forthcoming intellectual biography, Schelling: Heretic of Modernity (2018), Schelling’s Organic Form of Philosophy: Life as the Schema of Freedom (SUNY 2011).
Presented by the Philosophy Department at The New School for Social Research
Scholars working under the broad umbrella of New Materialism have offered compelling reappraisals of the ways in which we know, interact with, and exist in the world. This scholarship also intersects with recent work on music and sound, which raises rich sets of questions regarding human agency, material, ethics, aesthetics, embodiment, and the subject/object dichotomy, among other issues.
We invite scholars working in the humanities, arts and sciences to submit proposals for papers and performances that engage with the themes of sound and new materialism, broadly construed. We welcome work that adopts historical, technological, analytical, philosophical, materialist, and creative vantage points, among others. Overall, this conference will direct these diverse disciplinary and methodological perspectives towards convergent and critical issues, creating new, interdisciplinary lines of enquiry and generating original research.
The one-day conference will consist of panels that comprise of papers with short reflections by a moderator, as well as an evening concert that includes opportunities for discussion. The concluding concert of work that engages with these themes from creative perspectives will afford attendees with an opportunity to consider and discuss issues concerning sound, material, and agency in a forum that contrasts with, but also complements, our events during the day. Conference participants are strongly encouraged to attend both the daytime and evening portions of the conference.
Proposals are called for:
Paper presentations of 20 minutes with 10 minutes of Q&A.
Artistic presentation of 20 minutes with 10 minutes of discussion
Submission: Proposals of no more than 500 words (300 words for artistic presentation) should be submitted as a PDF by August 14th 2019 to jc5036@columbia.edu
and include “NMAS Submission” in the subject line. If you’re applying for an artistic presentation please include three representative 2 minute audio/video examples. Please also include the title of your proposed paper and anonymize your submission. Include your name, affiliation, and contact information in the body of the email, and also nominate any audio/visual requirements for your paper or performance.