Bibliographical note

In 1962 Jaakko Hintikka published Knowledge and Belief – An Introduction to the Logic of the Two Notions with Cornell University Press. There has hardly been a paper or a book on epistemic and doxastic logic since not referring to this seminal treatise. Although everybody in logic, mainstream and formal epistemology, game-theory, economics, computer science and social software refer to the book it is very likely that a great many have never literally had their hands on it as it went out of print in the late 1960’s (second printing in 1964, third printing in 1967 and fourth printing in 1969). It is our pleasure to provide the interdisciplinary community of logicians, epistemologists, game-theorists, computer scientists and other interested parties, with this new edition of Knowledge and Belief.
This edition has not been revised, only extended. There are two with each other related reasons for the extended version. Firstly, albeit it is generally acknowledged that Jaakko Hintikka is one of the founding fathers of epistemic and doxastic logic, his fundamental epistemological ambition with developing these logics has generally been neglected by formal and mainstream epistemologists alike. Thus, the current edition has been extended with a separate introductory chapter showing how Hintikka from the outset has been engaged in a dialectic movement between epistemology and logic. Secondly, his movement has been going on for more than 40 years so this edition includes some of Hintikka’s latest papers on the subject.