The Situation In Logic

The Situation in Logic

Situation Theory and situation semantics are recent approaches to language and information, approaches first formulated by Jon Barwise and John Perry in Situations and Attitudes (1983). The present volume collects some of Barwise's papers written since then, those directly concerned with relations among logic, situation theory, and situation semantics. Several papers appear here for the first time.

The Situation in Logic: On the model theory of common knowledge

Logic

Alexander Pfänder's classical phenomenological logic, a masterwork of unmatched clarity, is presented here for the first time in English. The book unfolds the general essence of logic, its object, not acts of thinking but objective "thoughts", meanings and higher unities formed by them: the nature and kinds (1) of judgments (propositions) and their truth and truth claims, (2) of concepts, and (3) of inferences; (4) the first foundational principles of logic (the principles of identity, contradiction, excluded middle, and sufficient reason) and of valid inferences, their foundation in ontological principles, as well as the valid forms of reasoning recognized in traditional logic and the reasons of their validity. Being a new phenomenological exposition of traditional logic, it reduces the symbolic language used to a minimum in order to concentrate on the logical meanings and laws themselves for which these symbols are signs.