This volume presents the Proceedings of the Sixth International Congress
of Logic, Methodology and Philosophy of Science. The Congress was held
at the University of Hannover, Federal Republic of Germany, from
August 22 to August 29, 1979, by the Division of Logic, Methodology and
Philosophy of Science of the International Union of History and Philosophy
of Science. The Congress took place under the patronage of the Nieder￾sachsische Minister fur Wissenschaft und Kunst, Prof. Dr. Dr. h. c. Eduard
Pestel.
The scientific programme of the Congress consisted of 3 plenary
lectures, one memorial, 47 invited lectures and 225 contributed papers,
presented orally by the participants. The complete programme is given
at the end of this volume.
The general theme of the Congress was