40 Years of Research in Possibilistic Logic – a Survey

Possibilistic logic is forty years old. Possibilistic logic is a logic that handles classical logic formulas associated with weights taking values in a linearly ordered set or more generally in a lattice. Over the decades, possibilistic logic has undergone numerous developments at both theoretical and applied levels. The ambition of this article is to review all these developments while exposing the main ideas behind them.