Table of Contents

T. Gaasterland, P. Godfrey, J. Minker: An overview of cooperative answering W. Chu, Q. Chen, M. Merzbacher: Cobase: a cooperative database system A. Hemerly, M. Casanova, A. Furtado: Exploiting user models to avoid misconstruals R. Nossum: Modal logics for practical reasoning R. Demolombe, A. Jones: Deriving answers to safety queries P. Mathieu, J-P. Delahaye: Abductive reasoning in three-valued logic for knowledge bases D. Gabbay, J. Pitt, R. Kempson: Labelled abduction and relevance reasoning A. Bonner: Hypothetical reasoning with intuitionistic logic C. Boutilier: A modal analysis for subjunctive queries G. Grahne, A. Mendelzon: Updates and subjunctive queries