This book is a tribute to Professor Ewa Or¿owska, a Polish logician who was celebrating the 60th year of her scientific career in 2017. It offers a collection of contributed papers by different authors and covers the most important areas of her research. Prof. Or¿owska made significant contributions to many fields of logic, such as proof theory, algebraic methods in logic and knowledge representation, and her work has been published in 3 monographs and over 100 articles in internationally acclaimed journals and conference proceedings. The book also includes Prof. Or¿owskäs autobiography, bibliography and a trialogue between her and the editors of the volume, as well as contributors' biographical notes, and is suitable for scholars and students of logic who are interested in understanding more about Prof. Or¿owskäs work.

Chapter 1. Everything is a Relation: A Preview (Joanna Goli¿ska-Pilarek).- Chapter 2. Autobiography (Ewa Or¿owska).- Chapter 3. Engaged in Relations: A Trialogue (Ewa Or¿owska).- Chapter 4. Bibliography of Ewa Or¿owska (Joanna Goli¿ska-Pilarek).- Chapter 5. Tableaus and Dual Tableaus (Melvin Fitting).- Chapter 6. Reasoning on Relations, Modalities, and Sets (Andrea Formisano). Chapter 7. Dual Tableau-Based Decision Procedures for Fragments of the Logic of Binary Relations (Domenico Cantone).- Chapter 8. Logics for Order-of-magnitude Qualitative Reasoning: Formalizing Negligibility (Alfredo Burrieza).- Chapter 9. Signed Dual Tableaux for Kleene Answer Set Programs (Patrick Doherty).- Chapter 10. Machine-checked Meta-theory of Dual-Tableaux for Intuitionistic Logic (Jeremy E. Dawson).- Chapter 11. Modal Syllogistic (Tsvetan Vasilev).- Chapter 12. About the Complete Axiomatization of Dynamic Extensions of Arrow Logic (Philippe Balbiani).- Chapter 13. Adaptive Rough Sets and Vague Concepts (Andrzej Skowron).- Chapter 14. Guttman Algebras and a Model Checking Procedure for Guttman Scales (Ivo Düntsch).- Chapter 15. A Reasoning System for Satis¿ability of Diagrammatic Speci¿cations (Yngve Lamo).- Chapter 16. (Heterogeneous) Structured Speci¿cations in Logics Without Interpolation (Carlos G. Lopez Pombo).- Chapter 17. Reasoning About Reversal-Bounded Counter Machines (Stéphane Demri).- Chapter 18. A Propositional Logical Encoding of Enriched Interactions in Abstract Argumentation Graphs (Claudette Cayrol).

Joanna Goli¿ska-Pilarek is an assistant professor at the Institute of Philosophy, University of Warsaw. Her research interests are focused on logic and its applications, in particular in philosophy, mathematics, cognitive and computer sciences. Recently, she has been working on logics for qualitative reasoning and their (relational) dual tableaux, non-Fregean logics with identity and equimeaning connectives. She has published in the leading international journals in the field (Annals of Pure and Applied Logic, Logic Journal of IGPL, Fuzzy Sets and Systems, Studia Logica, Mathematical Logic Quarterly, Journal of Philosophical Logic, Notre Dame Journal of Formal Logic). She has also co-authored a comprehensive survey monograph, Dual Tableaux: Foundations, Methodology, Case Studies, published by Springer (2011).

Michä Zawidzki is an assistant professor at the Department of Logic and Methodology of Science, University of ¿ód¿. He obtained his PhD from theUniversity of ¿ód¿ in 2013.  His research interests are in the fields of modal logics, hybrid logics, decidability, and computational complexity of non-classical logics, tableau calculi, and applications of logics in modeling human interactions. He is the author of a monograph on deductive systems for standard and non-standard hybrid logics. Between 2013 and 2017 he worked as a research fellow on the project Logics for Qualitative Reasoning under the supervision of Dr. Joanna Goli¿ska-Pilarek.