Modern Logic: Since GÖdel Since GÖdel The pace of development in logic picked up rapidly after Gödel's incompleteness theorems, and five branches emerged: set theory, model theory, proof theory, computability theory, and...

Classical logic identifies a class of formal logics that have been most intensively studied and most widely used. They are characterised by a number of properties[1]; non-classical logics are those that lack one or more of these properties, which...