Is a member of the Romanian Academy being specialized in Epistemological and Inductive Logic. He is director of "Gh. Zane" Institute of Economic and Social Researches, Romanian Academy, Iasi branch. He recently retired as a full professor of Logic for "Al. Ioan Cuza" University, where he taught and distinguished himself in many ways (dean of the Faculty of Philosophy and general chancellor of the university mentioned). He is a specialist in General, Deductive and Inductive Logic, in Logic and Philosophy of Science to which he has brought genuine contributions. He has published and coordinated volumes and studies for prestigious publishing houses, such as: The Scientific Publishing House, The Romanian Academy Publishing House, The European Institute, etc.

Among the numerous papers produced there are some which cannot be overlooked as it follows: The Inductive Methods (1975), Explanation and Understanding (2 volumes, 1980, 1994), Logic and Argumentation (2000), Looking Back in Deference (2010). He is director for Logos & Episteme journal and editor-in-chief for Symposium review.