This new printing of Van Dalen's popular text contains a complete treatment of elementary classical logic. Suggestions and comments from readers have been adopted, a number of errors have been corrected, and some definitions have been streamlined.

Dirk van Dalen studied at the University of Amsterdam, where he obtained his PhD. He has taught since 1960 at Utrecht University, where he is full professor. He also taught at MIT and Oxford. His technical work is mostly in the area of intuitionistic mathematics and logic. He uses to call attention to the benefits and challenges of constructive methods. His current project is a biography of L.E.J. Brouwer and the editing of Brouwer's correspondence.

New corrected printing of a well-established text on logic at the introductory level.

0. Introduction.- 1. Propositional Logic.- 2. Predicate Logic.- 3. Completeness and Applications.- 4. Second Order Logic.- 5. Intuitionistic Logic.- 6. Normalisation.