The papers delivered at the congress were divided into 17 sections. Thus the structure of the volume corresponds to the very schedule of the congress. Volume one contains the opening lecture by Andrzej K. Wróblewski as well as invited papers in sections of Proof Theory, Model Theory, Recursion Theory, Axiomatic Set Theory, Logic and Computation, Logic, Language and Cognition, Methodology, Probability, Induction, and Decision Theory, Philosophy of Logic, Mathematics, and Computer Science, and Philosophy of the Physical Sciences. Volume two contains the closing lecture by John Maynard Smith and the invited papers in sections of Philosophy of the Biological Sciences, Philosophy of Cognitive Science and Artificial Intelligence, Philosophy of Linguistics, Philosophy of the Social Sciences, Ethics of Science and Technology, History of Logic, Methodology, and Philosophy of Science, Philosophical Questions Raised by the History and Sociology of Science.