Knowledge and BeliefAn Introduction to the Logic of the Two Notionsby Jaakko HintikkaPrepared by Vincent F. Hendricks & John SymonsIn 1962 Jaakko Hintikka published Knowledge and Belief: An Introductionto the Logic of the Two Notions with Cornell University Press. Almostevery paper or a book on epistemic and doxastic logic that has appearedsince then has referred to this seminal work. Although many philosophersworking in logic, epistemology, game-theory, economics, computer scienceand linguistics mention the book, it is very likely that most have neverliterally had their hands on it, much less owned a copy. After a fourthprinting in 1969, Knowledge and Belief went out of print and as many ofus have found to our dismay, it has become increasingly difficult tofind used copies at our local shops or online. It is our pleasure toprovide the interdisciplinary community with this reprint edition ofKnowledge and Belief.Knowledge and Belief is a classic on which a generation - my generation- of epistemologists cut their teeth. This reissue is welcome. It willprovide something for the next generation to chew on. - Fred Dretske,Duke UniversityIt is wonderful to see this classic being reissued after so many yearsout of print. It was extremely influential in its day; its influencecontinues to this day, through the impact of epistemic logic in fieldsas diverse distributed computing, artificial intelligence, and gametheory. This reissue should make it possible for a new generation ofresearchers to appreciate Hintikka's groundbreaking work. - JosephHalpern, Cornell University