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ESSLLI 2012, Opole, Poland
The 7th meeting of the GLLI
prof. Johan van Benthem

On 14 October, 2010, Prof. Johan van Benthem, Professor of the University of Amsterdam (Holland) and Stanford University (the USA), delivered his lecture entitled Logic as a Theory of Intelligent Interaction. The lecture organized under the auspices of the Rector of Opole University was held in the Blue Aula of Collegium Maius of Opole University as part of The Golden Series of Open Lectures.

At the beginning, Professor Piotr Wieczorek, Vice-Rector of Opole University in charge of Research and Foreign Cooperation, welcomed the lecturer of the day and all the gathered on behalf of the University authorities and Opole academic community.

Professor Urszula Wybraniec-Skardowska welcomed the lecturer on behalf of the Opole Group of Logic, Language and Information, thanking him for accepting the invitation to visit Opole. She underlined the fact that the lecture given by Professor J. van Benthem initiated the activity of the Group in the new academic year. Professor U. Wybraniec-Skardowska welcomed also all the invited guests and students who attended the lecture.

Next, Professor Janusz Czelakowski presented the scientific silhouette of the lecturer.

Professor J. van Benthem’s lecture concerned relations between logic and processes of information flow in acts of communication and also dynamic-epistemic aspects of these processes. The interactive lecture discussed the fundamental ideas, assumptions, prospects and lines of development of dynamic-epistemic logic. Knowledge is formed through questions, evidence and experience. A conception of logic as the study of information-driven rational agency between many actors, of which reasoning is just one component was presented. Various aspects of rational agency (inference, perception, belief revision, communication, questioning etc.) are represented uniformly in systems of dynamic-epistemic logic. The lecturer underlined the importance of sources of logic in the dynamic framework, that is observation and deduction, questions and answers (communication in general), as well as dynamics of processes of learning. The role of research in the scope of cognitive psychology, research into the brain and experimental studies relating to the dependence of logic and games was highlighted.

The lecture rendered in a perfectly intelligible manner, ‘adorned’ with interesting examples, was enthusiastically received by the listeners. It was followed by a lively discussion in which a few issues outlined earlier by Professor J. van Benthem were raised and developed.

After the lecture, Professor J. van Benthem met representatives of the University authorities and took part in an open meeting-seminar of the Opole Group of Logic, Language and Information.

During the meeting of the Group, the discussion of certain aspects of “The Golden Lecture”, among others, processes of information flow as broadly understood linguistic activities (verbal and extra-verbal, conscious and non-conscious), as well as their relations with pragmatics, psychology, theory of action and theory of games, was continued. References were also made to the general condition of logic and attempts at breaking out of the existing limitations.