This volume contains the papers presented at AI 2007, the 20th conference of
the Canadian Society for the Computational Study of Intelligence (CSCSI). AI
2007 attracted a new record of 260 paper submissions. Each paper was assigned
to three reviewers who tirelessly worked to provide high-quality reviews. Out
of these, 46 high-quality papers were accepted for publication by the Program
Committee. The organization of AI 2007 has benefited from the collaboration of
many individuals. Foremost, we express our appreciation to the Program Committee
members and the additional reviewers who provided thorough and timely
reviews.We are grateful to Andrei Voronkov and the support team assisting with
the EasyChair Conference System that hosted the AI 2007 paper submission and
review process. We also extend our thanks to the School of Computer Science at
the University of Windsor for hosting the conference Web site. Finally, we thank
the Organizing Committee and the members of the CSCSI Executive Committee
for all their efforts in making AI 2007 a successful conference.