The subjects treated are : – Mathematical logic, – Foundations of mathematical theory, – Category theory, – Computability theory, – Philosophy of logic and mathematics, – Foundations of physical sciences, – Interpretation of the quantum mecanics, – Foundations of biology, of psychology, of social sciences, – Justice and social change, – Rationality in social sciences, – Problems in the methodology of science, – Foundations of probability and induction, – Basic problems in linguistics, – Transformational grammar. M.-M. V.