Abstract: I provide a truth-maker semantics for the conditional and consider the application to imperative and deontic conditionals.
The Logic and Metaphysics Workshop will be meeting on Mondays from 4:15 to 6:15 in room 7314 of the Graduate Center, CUNY (365 5th Avenue). The (provisional) schedule is as follows:
Feb 4. Melvin Fitting, CUNY
Feb 11. Benjamin Neeser, Geneva
Feb 18. GC CLOSED. NO MEETING
Feb 25. Achille Varzi, Columbia
Mar 4. Eric Bayruns Garcia, CUNY
Mar 11. Jeremy Goodman, USC
Mar 18. Romina Padro, CUNY
Mar 25. Kit Fine, NYU
Apr 1. Elena Ficara, Paderborn
Apr 8. Chris Scambler, NYU
Apr 15. Jenn McDonald, CUNY
Apr 22. GC CLOSED. NO MEETING
Apr 29. Tommy Kivatinos, CUNY
May 6. Daniel Durante, Natal
May 13. Martina Botti, Columbia
May 20. Vincent Peluce, CUNY
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.
details tba
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
In my talk I argue for the thesis CT: contradiction is the norm of truth, and ask about its relevance for contemporary philosophical logic. I first present three positions in the history of philosophy that have advocated some versions of CT, namely Plato’s idea of the “dialectical gymnastics” in the Parmenides (Plato, Parmenides 136 B-E), Aristotle’s notion of dialectics in the Topics (Aristotle, Topics I, 2-3) and Metaphysics (Aristotle, Met III 1, 995 a 24-29), and Hegel’s contradictio est regula veri (Hegel Werke 2, 533), then derive from them some answers to the questions:
What is meant by “contradiction” in CT?
What is meant by “truth” in CT?
What is meant by “norm” in CT?
I will show that to examine the meaning of CT in historical perspective is useful to understand the seeds of genuine glut theories.
The Logic and Metaphysics Workshop will be meeting on Mondays from 4:15 to 6:15 in room 7314 of the Graduate Center, CUNY (365 5th Avenue). The (provisional) schedule is as follows:
Feb 4. Melvin Fitting, CUNY
Feb 11. Benjamin Neeser, Geneva
Feb 18. GC CLOSED. NO MEETING
Feb 25. Achille Varzi, Columbia
Mar 4. Eric Bayruns Garcia, CUNY
Mar 11. Jeremy Goodman, USC
Mar 18. Romina Padro, CUNY
Mar 25. Kit Fine, NYU
Apr 1. Elena Ficara, Paderborn
Apr 8. Chris Scambler, NYU
Apr 15. Jenn McDonald, CUNY
Apr 22. GC CLOSED. NO MEETING
Apr 29. Tommy Kivatinos, CUNY
May 6. Daniel Durante, Natal
May 13. Martina Botti, Columbia
May 20. Vincent Peluce, CUNY
In this talk I will do three things. First: I will present the central results from Barrio, Pailos and Szmuc’s recent paper “A hierarchy of classical and paraconsistent logics” (forthcoming in the JPL) along with some generalizations derived by observing certain symmetries; second, I will discuss the relation between the strict tolerant logics and classical logic, K3 and LP; third, I will try to convey the exact state of uncertainty about the philosophical significance of the foregoing I find myself in on the day.
The Logic and Metaphysics Workshop will be meeting on Mondays from 4:15 to 6:15 in room 7314 of the Graduate Center, CUNY (365 5th Avenue). The (provisional) schedule is as follows:
Feb 4. Melvin Fitting, CUNY
Feb 11. Benjamin Neeser, Geneva
Feb 18. GC CLOSED. NO MEETING
Feb 25. Achille Varzi, Columbia
Mar 4. Eric Bayruns Garcia, CUNY
Mar 11. Jeremy Goodman, USC
Mar 18. Romina Padro, CUNY
Mar 25. Kit Fine, NYU
Apr 1. Elena Ficara, Paderborn
Apr 8. Chris Scambler, NYU
Apr 15. Jenn McDonald, CUNY
Apr 22. GC CLOSED. NO MEETING
Apr 29. Tommy Kivatinos, CUNY
May 6. Daniel Durante, Natal
May 13. Martina Botti, Columbia
May 20. Vincent Peluce, CUNY
The Logic and Metaphysics Workshop will be meeting on Mondays from 4:15 to 6:15 in room 7314 of the Graduate Center, CUNY (365 5th Avenue). The (provisional) schedule is as follows:
Feb 4. Melvin Fitting, CUNY
Feb 11. Benjamin Neeser, Geneva
Feb 18. GC CLOSED. NO MEETING
Feb 25. Achille Varzi, Columbia
Mar 4. Eric Bayruns Garcia, CUNY
Mar 11. Jeremy Goodman, USC
Mar 18. Romina Padro, CUNY
Mar 25. Kit Fine, NYU
Apr 1. Elena Ficara, Paderborn
Apr 8. Chris Scambler, NYU
Apr 15. Jenn McDonald, CUNY
Apr 22. GC CLOSED. NO MEETING
Apr 29. Tommy Kivatinos, CUNY
May 6. Daniel Durante, Natal
May 13. Martina Botti, Columbia
May 20. Vincent Peluce, CUNY
The Logic and Metaphysics Workshop will be meeting on Mondays from 4:15 to 6:15 in room 7314 of the Graduate Center, CUNY (365 5th Avenue). The (provisional) schedule is as follows:
Feb 4. Melvin Fitting, CUNY
Feb 11. Benjamin Neeser, Geneva
Feb 18. GC CLOSED. NO MEETING
Feb 25. Achille Varzi, Columbia
Mar 4. Eric Bayruns Garcia, CUNY
Mar 11. Jeremy Goodman, USC
Mar 18. Romina Padro, CUNY
Mar 25. Kit Fine, NYU
Apr 1. Elena Ficara, Paderborn
Apr 8. Chris Scambler, NYU
Apr 15. Jenn McDonald, CUNY
Apr 22. GC CLOSED. NO MEETING
Apr 29. Tommy Kivatinos, CUNY
May 6. Daniel Durante, Natal
May 13. Martina Botti, Columbia
May 20. Vincent Peluce, CUNY
Structural causal models lend themselves to an analysis of counterfactuals – a structural semantics of counterfactuals. The basic idea is that a causal model allows for the clear and precise evaluation of any counterfactual encoded by it. Many argue that a structural semantics is superior to a more traditional similarity semantics, in part due to the latter’s independence from any notion of similarity(Galles & Pearl, 1998; Gallow, 2016; Hiddleston, 2005; Hitchcock, 2018; Pearl, 2000; Starr, 2019). I argue, though, that this is too quick. A similarity semantics employs the notion of similarity to answer what Priest (2018) calls the importation problem– the question of what information is to be held fixed in a counterfactual evaluation. I argue that where similarity semantics relies on an unarticulated notion of similarity, a structural semantics relies on an unarticulated notion of aptness. The superiority of structural semantics depends on its ability to deliver on a principled guide to determining which model(s) is apt. In this talk I go some way towards providing this guide.
The Logic and Metaphysics Workshop will be meeting on Mondays from 4:15 to 6:15 in room 7314 of the Graduate Center, CUNY (365 5th Avenue). The (provisional) schedule is as follows:
Feb 4. Melvin Fitting, CUNY
Feb 11. Benjamin Neeser, Geneva
Feb 18. GC CLOSED. NO MEETING
Feb 25. Achille Varzi, Columbia
Mar 4. Eric Bayruns Garcia, CUNY
Mar 11. Jeremy Goodman, USC
Mar 18. Romina Padro, CUNY
Mar 25. Kit Fine, NYU
Apr 1. Elena Ficara, Paderborn
Apr 8. Chris Scambler, NYU
Apr 15. Jenn McDonald, CUNY
Apr 22. GC CLOSED. NO MEETING
Apr 29. Tommy Kivatinos, CUNY
May 6. Daniel Durante, Natal
May 13. Martina Botti, Columbia
May 20. Vincent Peluce, CUNY
Neuroprediction, the use of neuroscientific data to predict human behavior, can sound like science fiction. But with the advent of neuroimaging and the continuing rapid development of other non-invasive brain measurements, neuroprediction is increasingly a real-world phenomenon.
Deep philosophical, legal, and neuroscientific questions arise regarding the use of these methods to predict behavior. Like all scientific tools, whether or not these technologies are used responsibly depends on who uses them. For instance, recent research illustrates the potential use of neuroprediction to assess an individual’s risk of (re-)engaging in antisocial conduct in forensic contexts. While the use of brain-based data may add predictive value to existing risk assessment tools, at the same time, the use (or misuse) of neuroprediction in courtrooms may imply violations of individual rights and liberties under the pretext of enhancing public safety. In addition to these legal implications, neuroprediction presents several technological and neuroscientific challenges. The non-invasive measures currently available are only indirect measures of cognitive activity. Understanding the conceptual, ethical, and legal dimensions surrounding the use of neuroprediction technologies helps crystallize the issues at hand and potentially provides moral guidance for those who wish to capitalize on these new tools as their prevalence and specificity continue to advance.
In this seminar, four experts from neuroscience, law, and philosophy will discuss recent findings in neuroprediction research, the predictive power of brain-based evidence compared to behavioral evidence, as well as the ethical and legal concerns emerging from the entrance of neuroprediction in the courts of law.
Speakers:
Arielle Baskin-Sommers, Assistant Professor of Psychology and Psychiatry, Yale University
Martha Farah, Annenberg Professor of Natural Sciences, University of Pennsylvania
Kent Kiehl, Professor of Psychology and Neuroscience, University of New Mexico
Walter Sinnott-Armstrong, Chauncey Stillman Professor of Practical Ethics, Duke University
Discussant:
Jeffrey A. Fagan, Isidor and Seville Sulzbacher Professor of Law and Professor of Epidemiology, Columbia University
Moderator:
Federica Coppola, Presidential Scholar in Society and Neuroscience, Columbia University
Free and open to the public, but RSVP is required via Eventbrite. This event is part of the Seminars in Society and Neuroscience series.
14.30 – 15.30: Kit Fine: A Truthmaker Semantics for Conditional Imperatives
15.30 – 15.45: Coffee Break
15.45 – 16.45: Friederike Moltmann: Underspecification of Attitudes and Truthmaker
Semantics
16.45-17.00: Coffee Break
17.00 – 18.00: Federico Faroldi: Truthmaker Semantics for Justification Logics – Open
Problems (joint work with Tudor Protopopescu)
18.00-18.15: Coffee Break
18.15 – 19.15: Cian Dorr: Truthmaking in the Object Language
K. Fine: A Truthmaker Semantics for Conditional Imperatives
I provide a truth-maker semantics for conditional imperatives and indicate how it might be extended to other conditional constructions.
F. Moltmann: Underspecification of Attitudes and Truthmaker Semantics
It has been argued that the satisfaction conditions of a desire can be underspecified by the complement clause. This provides support for the view according to which the complement clause gives a partial content of the reported desire, where partial content is formulated in terms of truthmaker theory. In this talk, I will discuss the extent of such underspecification and whether it truly supports a truthmaker-based approach to the content of attitudes.
Optional preparatory reading here.
F. Faroldi: Truthmaker Semantics for Justification Logics – Open Problems
Justification logics are a family of logic where "implicit" modal operators are substituted by explicit terms to get formulas of the form t : A, where t could be evidence, a reason, etc. why A is known, believed, obligatory, etc., thus resulting in an “objectual” approach to modalities. In this talk we explore how to give a truthmaker semantics for justification logics, we provide some philosophical reasons to do so, and note some technical open problems.
Cian Dorr: Truthmaking in the Object Language
I consider a simple language with Boolean connectives, sentential variables and quantifiers binding them, and a connective for propositional identity (‘for it to be the case that … is for it to be the case that …’). Using familiar techniques, the possible-worlds model theory for such a language can be ‘internalised’ to derive a theory stated in the language itself, based on the definition of ‘world-proposition’ as ‘maximal consistent proposition’, and this theory can be shown to follow from the theory that propositions form a complete atomic Boolean algebra. In this paper, I will consider to what extent something similar can be done for Fine’s truthmaker semantics. This will involve looking for a way of picking out a class of special propositions to serve as surrogates for the states, and a binary relation among propositions to serve as a surrogate for the verification relation, and using these definitions to rewrite the metalinguistic definition of a model as theory in the object-language. I will make a start at considering to what extent the axioms of this theory can be derived from an independently natural weakening of the theory that propositions form a complete atomic Boolean algebra.
Convergence to the truth is viewed with some ambivalence in philosophy of science. On the one hand, methods of inquiry that lead to the truth in the limit are prized as marks of scientific rationality. But an agent who, by using some method, expects to always converge to the truth seems to fail a minimum standard of epistemic modesty. This point was recently brought home by Gordon Belot in his critique of Bayesian epistemology. In this paper I will study convergence to the truth theorems within the framework of Edward Nelson’s radically elementary probability theory. This theory provides an enriched conceptual framework for investigating convergence and gives rise to an appropriately modest from of Bayesianism.
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.
details tba
02/08/2019 Faculty House, Columbia University
4:00 PM
03/22/2019 Faculty House, Columbia University
4:00 PM
04/19/2018 Faculty House, Columbia University
4:00 PM