Our conference is an interdisciplinary meeting of philosophers, mathematicians and a wide spectrum of researchers whose interests are in the area of pure or applied logic. Held from 1996, it is always located in Sudety Mountains, usually in the town of Karpacz. Traditionally, the organizers of the conference are Chair of Logic, Wroclaw University, Institute of Mathematics, Opole University and Institute of Mathematics, University of Silesia at Katowice. Each edition of the conference is devoted to one specific topic. In the recent years among them were the works of Alfred Tarski, equivalential logic, general issues related to algebraic semantics in metalogic, connections between logic and the theory of communication, algebraization of logic, induction and paradoxes.