This volume contains revised and extended versions of the papers presented at the Second International Workshop on Non-Monotonic Reasoning, held in Grassau (FRG), June 13-15, 1988. The workshop brought together researchers with different backgrounds, including non-monotonic logic, logic programming, truth maintenance and philosophy. Their papers contain substantial advances to the logical foundations of non-monotonic reasoning, its computational realization, and its application to the formalization of common sense reasoning. The book presents a snapshot of the state of the art in this...

The Truth Maintenance Workshop was held in August 1990 during the European Conference on Artificial Intelligence in Stockholm, Sweden. Ten selected papers, eight of them presented at the workshop, are included in this volume. The papers can be grouped into four main areas: - Meta-level control: the goal here is to specify some meta-criteria to control the behavior of the TMS. - Extensions of TMS: here the aim is to incorporate new mechanisms into TMS-like systems. - Foundations: there is now much interest in providing formal descriptions of...