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Profile: Eric Pacuit (University of Maryland, College Park)
  1.  45
    Merging Frameworks for Interaction.van Benthem Johan, Gerbrandy Jelle, Hoshi Tomohiro & Pacuit Eric - 2009 - Journal of Philosophical Logic 38 (5):491-526.
    A variety of logical frameworks have been developed to study rational agents interacting over time. This paper takes a closer look at one particular interface, between two systems that both address the dynamics of knowledge and information flow. The first is Epistemic Temporal Logic (ETL) which uses linear or branching time models with added epistemic structure induced by agents’ different capabilities for observing events. The second framework is Dynamic Epistemic Logic (DEL) that describes interactive processes in terms of epistemic event (...)
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  2.  16
    Dynamic Logics of Evidence-Based Beliefs.Johan van Benthem & Eric Pacuit - 2011 - Studia Logica 99 (1-3):61-92.
  3.  18
    Evidence and Plausibility in Neighborhood Structures.Johan van Benthem, David Fernández-Duque & Eric Pacuit - 2014 - Annals of Pure and Applied Logic 165 (1):106-133.
    The intuitive notion of evidence has both semantic and syntactic features. In this paper, we develop an evidence logic for epistemic agents faced with possibly contradictory evidence from different sources. The logic is based on a neighborhood semantics, where a neighborhood N indicates that the agent has reason to believe that the true state of the world lies in N. Further notions of relative plausibility between worlds and beliefs based on the latter ordering are then defined in terms of this (...)
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  4.  57
    Dynamic Epistemic Logic I: Modeling Knowledge and Belief.Eric Pacuit - 2013 - Philosophy Compass 8 (9):798-814.
    Dynamic epistemic logic, broadly conceived, is the study of logics of information change. This is the first paper in a two-part series introducing this research area. In this paper, I introduce the basic logical systems for reasoning about the knowledge and beliefs of a group of agents.
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  5.  45
    The Logic of Knowledge Based Obligation.Eric Pacuit, Rohit Parikh & Eva Cogan - 2006 - Synthese 149 (2):311-341.
    Deontic Logic goes back to Ernst Mally’s 1926 work, Grundgesetze des Sollens: Elemente der Logik des Willens [Mally. E.: 1926, Grundgesetze des Sollens: Elemente der Logik des Willens, Leuschner & Lubensky, Graz], where he presented axioms for the notion ‘p ought to be the case’. Some difficulties were found in Mally’s axioms, and the field has much developed. Logic of Knowledge goes back to Hintikka’s work Knowledge and Belief [Hintikka, J.: 1962, Knowledge and Belief: An Introduction to the Logic of (...)
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  6. Editorial Introduction: Selected Papers From the 2nd Workshop on Logic, Rationality and Interaction (LORI-II). [REVIEW]Eric Pacuit - 2012 - Journal of Philosophical Logic 41 (4):629-631.
  7.  21
    Understanding the Brandenburger-Keisler Paradox.Eric Pacuit - 2007 - Studia Logica 86 (3):435-454.
    Adam Brandenburger and H. Jerome Keisler have recently discovered a two person Russell-style paradox. They show that the following configurations of beliefs is impossible: Ann believes that Bob assumes that Ann believes that Bob’s assumption is wrong. In [7] a modal logic interpretation of this paradox is proposed. The idea is to introduce two modal operators intended to represent the agents’ beliefs and assumptions. The goal of this paper is to take this analysis further and study this paradox from the (...)
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  8.  38
    Toward a Theory of Play: A Logical Perspective on Games and Interaction.Johan van Benthem & Eric Pacuit - unknown
    The combination of logic and game theory provides a fine-grained perspective on information and interaction dynamics, a Theory of Play. In this paper we lay down the main components of such a theory, drawing on recent advances in the logical dynamics of actions, preferences, and information. We then show how this fine-grained perspective has already shed new light on the long-term dynamics of information exchange, as well as on the much-discussed question of extensive game rationality.
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  9.  43
    Dynamic Epistemic Logic II: Logics of Information Change.Eric Pacuit - 2013 - Philosophy Compass 8 (9):815-833.
    This is the second paper in a two-part series introducing logics for reasoning about the dynamics of knowledge and beliefs. Part I introduced different logical systems that can be used to reason about the knowledge and beliefs of a group of agents. In this second paper, I show how to adapt these logical systems to reason about the knowledge and beliefs of a group of agents during the course of a social interaction or rational inquiry. Inference, communication and observation are (...)
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  10.  4
    Changing Types: Information Dynamics for Qualitative Type Spaces.Dominik Klein & Eric Pacuit - 2014 - Studia Logica 102 (2):297-319.
    Many different approaches to describing the players’ knowledge and beliefs can be found in the literature on the epistemic foundations of game theory. We focus here on non-probabilistic approaches. The two most prominent are the so-called Kripkeor Aumann- structures and knowledge structures (non-probabilistic variants of Harsanyi type spaces). Much of the recent work on Kripke structures has focused on dynamic extensions and simple ways of incorporating these. We argue that many of these ideas can be applied to knowledge structures as (...)
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  11.  33
    Substantive Assumptions in Interaction: A Logical Perspective.Olivier Roy & Eric Pacuit - 2013 - Synthese 190 (5):891-908.
    In this paper we study substantive assumptions in social interaction. By substantive assumptions we mean contingent assumptions about what the players know and believe about each other’s choices and information. We first explain why substantive assumptions are fundamental for the analysis of games and, more generally, social interaction. Then we show that they can be compared formally, and that there exist contexts where no substantive assumptions are being made. Finally we show that the questions raised in this paper are related (...)
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  12.  13
    Reasoning with Protocols Under Imperfect Information.Eric Pacuit & Sunil Simon - 2011 - Review of Symbolic Logic 4 (3):412-444.
    We introduce and study a PDL-style logic for reasoning about protocols, or plans, under imperfect information. Our paper touches on a number of issues surrounding the relationship between an agent’s abilities, available choices, and information in an interactive situation. The main question we address is under what circumstances can the agent commit to a protocol or plan, and what can she achieve by doing so?
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  13.  10
    Voting Methods.Eric Pacuit - forthcoming - Stanford Encyclopedia of Philosophy.
  14.  51
    Logic and Intelligent Interaction.Ågotnes Thomas, Benthem Johan van & Pacuit Eric - 2009 - Synthese 169 (2):219 - 221.
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  15. Logics of Informational Attitudes and Informative Actions.Eric Pacuit - 2010 - Journal of the Indian Council of Philosophical Research 27 (2):37.
  16. First-Order Classical Modal Logic.Horacio Arló-Costa & Eric Pacuit - 2006 - Studia Logica 84 (2):171 - 210.
    The paper focuses on extending to the first order case the semantical program for modalities first introduced by Dana Scott and Richard Montague. We focus on the study of neighborhood frames with constant domains and we offer in the first part of the paper a series of new completeness results for salient classical systems of first order modal logic. Among other results we show that it is possible to prove strong completeness results for normal systems without the Barcan Formula (like (...)
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  17.  24
    On the Use of Logic in Game Theory.Eric Pacuit - 2015 - Journal of Philosophical Logic 44 (6):741-753.
    IntroductionA quick glance at the opening paragraphs in many of the classic logic textbooks reveals a common view: Logical methods highlight the reasoning patterns of a single agent engaged in some form of mathematical thinking.A sampling from my bookshelf: Shoenfield’s Mathematical Logic: “Logic is the study of reasoning; and mathematical logic is the study of the type of reasoning done by mathematicians”; Enderton’s A Mathematical Introduction of Logic: “Symbolic logic is a mathematical model of deductive thought”; and Chiswell and Hodges (...)
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  18.  75
    Notes on Modal Logic.Eric Pacuit - unknown
    These short notes are intended to supplement the lectures and text ntroduce some of the basic concepts of Modal Logic. The primary goal is to provide students in Philosophy 151 at Stanford University with a study guide that will complement the lectures on modal logic. There are many textbooks that you can consult for more information. The following is a list of some texts (this is not a complete list, but a pointer to books that I have found particularly useful).
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  19.  59
    First-Order Classical.Eric Pacuit - unknown
    The paper focuses on extending to the first order case the semantical program for modalities first introduced by Dana Scott and Richard Montague. We focus on the study of neighborhood frames with constant domains and we offer a series of new completeness results for salient classical systems of first order modal logic. Among other results we show that it is possible to prove strong completeness results for normal systems without the Barcan Formula in terms of neighborhood frames with constant domains. (...)
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  20.  26
    Dynamic Logics of Knowledge and Access.Tomohiro Hoshi & Eric Pacuit - 2010 - Synthese 177 (1):29 - 49.
    A recurring issue in any formal model representing agents' (changing) informational attitudes is how to account for the fact that the agents are limited in their access to the available inference steps, possible observations and available messages. This may be because the agents are not logically omniscient and so do not have unlimited reasoning ability. But it can also be because the agents are following a predefined protocol that explicitly limits statements available for observation and/or communication. Within the broad literature (...)
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  21. Horacio Arló-Costa.Eric Pacuit - 2006 - Studia Logica 84:171-210.
     
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  22.  59
    First Order Classical Modal Logic, Studia Logica, 84, 2, 171-210, 2006.Horacio Arlo-Costa & Eric Pacuit - manuscript
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  23.  29
    Temporal Logics of Agency.Johan van Benthem & Eric Pacuit - 2010 - Journal of Logic, Language and Information 19 (4):389-393.
  24.  1
    Some Comments on History Based Structures.Eric Pacuit - 2007 - Journal of Applied Logic 5 (4):613-624.
  25.  2
    An Abstract Approach to Reasoning About Games with Mistaken and Changing Beliefs.Benedikt Löwe & Eric Pacuit - 2008 - Australasian Journal of Logic 6 (7):162-181.
    We do not believe that logic is the sole answer to deep and intriguing questions about human behaviour, but we think that it might be a useful tool in simulating and understanding it to a certain degree and in specifically restricted areas of application. We do not aim to resolve the question of what rational behaviour in games with mistaken and changing beliefs is. Rather, we develop a formal and abstract framework that allows us to reason about behaviour in games (...)
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  26.  1
    Indian Institute of Technology, Kanpur January 14–26, 2008.Ramon Jansana, Mai Gehrke, Alessandra Palmigiano, Mihir K. Chakraborty, Didier Dubois, Eric Pacuit, Rohit Parikh & Prakash Panangaden - 2008 - Bulletin of Symbolic Logic 14 (4).
  27. Proceedings of the Foundations of the Formal Sciences VI: Reasoning About Probabilities and Probabilistic Reasoning.Benedikt Lowe, Jan-Willem Romeijn & Eric Pacuit (eds.) - 2008 - College Publications.
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