R. Ramanujam Sundar Sarukkai (Eds.) Logic and Its 8 7 3 5 I Applications A N L Third Indian Conference, ICLA 2009 Chennai, India, January 2009 Proceedings 123 Lecture Notes in Artificial Intelligence 5378 EditedbyR.Goebel,J.Siekmann,andW.Wahlster Subseries of Lecture Notes in Computer Science FoLLI Publications on Logic, Language and Information Editors-in-Chief LuigiaCarlucciAiello,UniversityofRome"LaSapienza",Italy MichaelMoortgat,UniversityofUtrecht,TheNetherlands MaartendeRijke,UniversityofAmsterdam,TheNetherlands EditorialBoard CarlosAreces,INRIALorraine,France NicholasAsher,UniversityofTexasatAustin,TX,USA JohanvanBenthem,UniversityofAmsterdam,TheNetherlands RaffaellaBernardi,FreeUniversityofBozen-Bolzano,Italy AntalvandenBosch,TilburgUniversity,TheNetherlands PaulBuitelaar,DFKI,Saarbrücken,Germany DiegoCalvanese,FreeUniversityofBozen-Bolzano,Italy AnnCopestake,UniversityofCambridge,UnitedKingdom RobertDale,MacquarieUniversity,Sydney,Australia LuisFariñas,IRIT,Toulouse,France ClaireGardent,INRIALorraine,France RajeevGoré,AustralianNationalUniversity,Canberra,Australia ReinerHähnle,ChalmersUniversityofTechnology,Göteborg,Sweden WilfridHodges,QueenMary,UniversityofLondon,UnitedKingdom CarstenLutz,DresdenUniversityofTechnology,Germany ChristopherManning,StanfordUniversity,CA,USA ValeriadePaiva,PaloAltoResearchCenter,CA,USA MarthaPalmer,UniversityofPennsylvania,PA,USA AlbertoPolicriti,UniversityofUdine,Italy JamesRogers,EarlhamCollege,Richmond,IN,USA FrancescaRossi,UniversityofPadua,Italy YdeVenema,UniversityofAmsterdam,TheNetherlands BonnieWebber,UniversityofEdinburgh,Scotland,UnitedKingdom IanH.Witten,UniversityofWaikato,NewZealand R. Ramanujam Sundar Sarukkai (Eds.) Logic and Its Applications Third Indian Conference, ICLA 2009 Chennai, India, January 7-11, 2009 Proceedings 1 3 SeriesEditors RandyGoebel,UniversityofAlberta,Edmonton,Canada JörgSiekmann,UniversityofSaarland,Saarbrücken,Germany WolfgangWahlster,DFKIandUniversityofSaarland,Saarbrücken,Germany VolumeEditors R.Ramanujam InstituteofMathematicalSciences CITCampus,Chennai600113,India E-mail:[email protected] SundarSarukkai NationalInstituteofAdvancedStudies IndianInstituteofScienceCampus,Bangalore560012,India E-mail:[email protected] LibraryofCongressControlNumber:Appliedfor CRSubjectClassification(1998):I.2.3,I.2,F.1-4,D.2.4 LNCSSublibrary:SL7–ArtificialIntelligence ISSN 0302-9743 ISBN-10 3-540-92700-XSpringerBerlinHeidelbergNewYork ISBN-13 978-3-540-92700-6SpringerBerlinHeidelbergNewYork Thisworkissubjecttocopyright.Allrightsarereserved,whetherthewholeorpartofthematerialis concerned,specificallytherightsoftranslation,reprinting,re-useofillustrations,recitation,broadcasting, reproductiononmicrofilmsorinanyotherway,andstorageindatabanks.Duplicationofthispublication orpartsthereofispermittedonlyundertheprovisionsoftheGermanCopyrightLawofSeptember9,1965, initscurrentversion,andpermissionforusemustalwaysbeobtainedfromSpringer.Violationsareliable toprosecutionundertheGermanCopyrightLaw. springer.com ©Springer-VerlagBerlinHeidelberg2009 PrintedinGermany Typesetting:Camera-readybyauthor,dataconversionbyScientificPublishingServices,Chennai,India Printedonacid-freepaper SPIN:12591718 06/3180 543210 Preface This volume contains the papers presentedat ICLA 2009:Third Indian Confer- enceonLogicandItsApplications(ICLA)heldattheInstituteofMathematical Sciences, Chennai, Januay 7–11,2009. The ICLA series aims to bring together researchers from a wide variety of fields that formal logic plays a significant role in, along with mathematicians, philosophers, computer scientists and logicians studying foundations of formal logic in itself. A special feature of this conference are studies in systems of logic in the Indian tradition,andhistoricalresearchonlogic.The biennial conference is organized by the Association for Logic in India. Thepapersinthevolumespanawiderangeofthemes.Wehavecontributions to algebraic logic and set theory, combinatorics and philosophical logic. Modal logics,withapplicationsincomputerscienceandgametheory,arediscussed.Not only do we have papers discussing connections between ancient logical systems withmodernones,butalsothoseofferingcomputationaltoolsforexperimenting withsuchsystems.ItishopedthatICLAwillactasaplatformforsuchdialogues arising from many disciplines, using formal logic as its common language. Like the previous conferences (IIT-Bombay; January 2005 and 2007) and (Jadavpur University, Kolkata; January 2007), the third conference also mani- fested this confluence of several disciplines. As in the previous years, we were fortunatetohaveanumberofhighlyeminentresearchersgivingplenarytalks.It givesusgreatpleasuretothankJohanvanBenthem,RajeevGor´e,JoelHamkins, Johann Makowsky, Rohit Parikh, Esko Turunen and Moshe Vardi for agreeing to give invited talks and for contributing to this volume. The ProgrammeCommittee,with helpfrommanyexternalreviewers,put in a greatdealof hardworkto select papersfrom the submissions.We express our gratitude to all members for doing an excellent job and thank all the reviewers for their invaluable help. ICLA 2009 included two pre-conference workshops: one on Algebraic Logic coordinated by Mohua Banerjee (IIT Kanpur) and Mai Gehrke (Radboud Uni- versiteit,Nijmegen),andanotheronLogicsforSocialInteractioncoordinatedby SujataGhosh(ISIKolkata),EricPacuit(StanfordUniversity)andR.Ramanujam (IMScChennai).Wethanktheorganizersaswellasthespeakersintheworkshops forcontributingsosignificantlytotheprogramme. The conference was held at the Institute of Mathematical Sciences (IMSc), Chennai. We thank IMSc and the Organizing Committee for taking on the re- sponsibility.SpecialthanksareduetoSunilSimon(IMSc)forhelpinpreparation of this volume. The Easychairsystem needs special mention, for its tremendous versatility. We also thank the EditorialBoardof the FoLLI series and Springer for pub- lishing this volume. October 2008 R. Ramanujam Sundar Sarukkai Organization Institute of Mathematical Sciences, Chennai Programme Chairs R. Ramanujam Sundar Sarukkai Programme Committee Natasha Alechina Mohua Banerjee Agata Ciabattoni Jonardon Ganeri Mai Gehrke Kevin Kelly Kamal Lodaya Benedikt Loewe Larry Moss Ranjan Mukhopadhyay Eric Pacuit Arun Pujari N. Raja K. Ramasubramanian Mark Siderits Local Organization Sujata Ghosh S. Krishna Sunil Simon Arindama Singh S.P. Suresh Reviewers Natasha Alechina Mihir K. Chakraborty Horacio Arlo-Costa Anna Chernilovskaya Mohua Banerjee Agata Ciabattoni Walter Carnielli Pierre-Louis Curien VIII Organization Anuj Dawar Luca Motto Ros Paul Dekker Larry Moss Antonio Di Nola Ranjan Mukhopadhyay Hans van Ditmarsch Hiroakira Ono Didier Dubois Martin Otto Christian Fermueller Wojciech Plandowski Jonardon Ganeri Lech Polkowski Mai Gehrke Eric Pacuit Sujata Ghosh Arun Pujari Valentin Goranko N. Raja Joanna Grygiel R. Ramanujam Wiebe van der Hoek K. Ramasubramanian Tomohiro Hoshi Jan-Willem Romeijn Gerard Huet Prahlad Sampath Juhani Karhumaki Sundar Sarukkai Kevin Kelly Mark Siderits Benny Kenkireth Carsten Sinz Amba Kulkarni S.P. Suresh Tiago de Lima Kazushige Terui Kamal Lodaya Joerg Tuske Iris Loeb Pawel Urzyczyn Benedikt Loewe Gregory Wheeler George Metcalfe Eva Wilhelmus Pabitra Mitra Stefan Woltran Thomas M¨oller Anna Zamansky Table of Contents Decisions, Actions, and Games: A Logical Perspective (Invited Talk) ... 1 Johan van Benthem Machine Checking Proof Theory: An Application of Logic to Logic (Invited Talk) ................................................... 23 Rajeev Gor´e Some Second Order Set Theory (Invited Talk) ....................... 36 Joel David Hamkins Connection Matrices for MSOL-Definable Structural Invariants (Invited Talk) ................................................... 51 Johann Makowsky Knowledge, Games and Tales from the East (Invited Talk) ............ 65 Rohit Parikh A Para Consistent Fuzzy Logic (Invited Talk) ....................... 77 Esko Turunen From Philosophical to Industrial Logics (Invited Talk) ................ 89 Moshe Y. Vardi Game Quantification Patterns ..................................... 116 Dietmar Berwanger and Sophie Pinchinat Extensive Questions: From Research Agendas to Interrogative Strategies ....................................................... 131 Emmanuel J. Genot An Analytic Logic of Aggregation.................................. 146 Patrick Girard and Jeremy Seligman Instantial Relevance in Polyadic Inductive Logic ..................... 162 Ju¨rgen Landes, Jeff Paris, and Alena Vencovska´ Algebraic Study of Lattice-Valued Logic and Lattice-Valued Modal Logic........................................................... 170 Yoshihiro Maruyama A General Setting for the Pointwise Investigation of Determinacy ...... 185 Yurii Khomskii A Two-Dimensional Hybrid Logic of Subset Spaces................... 196 Yi N. Wang X Table of Contents A Unified Framework for Certificate and Compilation for QBF ........ 210 Igor St´ephan and Benoit Da Mota Towards Decidability of Conjugacy of Pairs and Triples ............... 224 Benny George Kenkireth and Samrith Ram Gautama – Ontology Editor Based on Nyaya Logic................... 232 G.S. Mahalakshmi, T.V. Geetha, Arun Kumar, Dinesh Kumar, and S. Manikandan Formal Definitions of Reason Fallacies to Aid Defect Exploration in Argument Gaming ............................................... 243 G.S. Mahalakshmi and T.V. Geetha The Art of Non-asserting: Dialogue with Na¯ga¯rjuna .................. 257 Marie-H´el`ene Gorisse Author Index.................................................. 269 Decisions, Actions, and Games: A Logical Perspective Johan van Benthem Amsterdam & Stanford http://staff.science.uva.nl/∼johan 1 Introduction: Logic and Games Over the past decades, logicians interested in rational agency and intelligent interaction studied major components of these phenomena, such as knowledge, belief,andpreference.Inrecentyears,standard‘static’logicsdescribinginforma- tion states of agents have been generalized to dynamic logics describing actions and events that produce information, revise beliefs, or change preferences, as explicit parts of the logical system. [22], [1], [12] are up-to-date accounts of this dynamic trend (the present paper follows Chapter 9 of the latter book). But in reality,concreterationalagencycontainsallthese dynamic processesentangled. A concrete setting for this entanglement are games – and this paper is a survey of their interfaces with logic, both static and dynamic. Games are intriguing also since their analysis brings together two major streams, or tribal communi- ties: ‘hard’ mathematical logics of computation, and ‘soft’ philosophical logics of propositional attitudes. Of course, this hard/soft distinction is spurious, and there is no natural border line between the two sources: it is their congenial mixture that makes current theories of agency so lively. We will discuss both statics, viewing games as fixed structures representing all possible runs of some process, and the dynamics that arises when we make thingshappenonsucha‘stage’.We startwithafew examplesshowingwhatwe are interested in. Then we move to a series of standard logics describing static game structure, from moves to preferences and epistemic uncertainty. Next, we introduce dynamic logics, and see what they add in scenarios with information update and belief revision where given games can change as new information arrives. This paper is meant to make a connection. It is not a full treatment of logical perspectives on games, for which we refer to [13]. 2 Decisions, Practical Reasoning, and ‘Solving’ Games Action and Preference. Even the simplest scenarios of practical reasoning about agents involve a number of notions at the same time: Example 1 (Onesingledecision).Anagenthastwoalternativecoursesofaction, but prefers one outcome to the other: R.RamanujamandS.Sarukkai(Eds.):ICLA2009,LNAI5378,pp.1–22,2009. (cid:1)c Springer-VerlagBerlinHeidelberg2009