Jacek J. Jadacki, Ph.D. (1977), professor emeritus of philosophy, the University of Warsaw, specialized in logic (with an emphasis on semiotics) and the history of Polish analytical thought. In the years between 1993 and 2001, he edited Filozofia Nauki [Philosophy of Science]; since 1998, he has been the editor-in-chief of the series Polish Analytical Philosophy. He is the author of studies concerning: semiotics in relation to ontology, epistemology, and axiology; the Lvov-Warsaw School (Twardowski, Łukasiewcz, Leśniewski, Ajdukiewicz, Dąmbska). Edward M. Świderski, Ph.D. (1978), professor emeritus of philosophy, the University of Fribourg, specialized in Russian and Soviet thought as well as twentieth-century Polish philosophy, with emphasis on phenomenology. For thirty years he edited Studies in Soviet Thought (beginning in 1992 Studies in East European Thought). He is the author of studies concerning: Soviet aesthetics and post-Soviet social and cultural theory; Ingarden’s ontology and aesthetics; Polish Marxism (Brzozowski, Kołakowski; the Poznań School), and J.M. Bocheński’s ethics.

Jacek J. Jadacki, Ph.D. (1977), professor emeritus of philosophy, the University of Warsaw, specialized in logic (with an emphasis on semiotics) and the history of Polish analytical thought. In the years between 1993 and 2001, he edited Filozofia Nauki [Philosophy of Science]; since 1998, he has been the editor-in-chief of the series Polish Analytical Philosophy. He is the author of studies concerning: semiotics in relation to ontology, epistemology, and axiology; the Lvov-Warsaw School (Twardowski, Łukasiewcz, Leśniewski, Ajdukiewicz, Dąmbska). Edward M. Świderski, Ph.D. (1978), professor emeritus of philosophy, the University of Fribourg, specialized in Russian and Soviet thought as well as twentieth-century Polish philosophy, with emphasis on phenomenology. For thirty years he edited Studies in Soviet Thought (beginning in 1992 Studies in East European Thought). He is the author of studies concerning: Soviet aesthetics and post-Soviet social and cultural theory; Ingarden’s ontology and aesthetics; Polish Marxism (Brzozowski, Kołakowski; the Poznań School), and J.M. Bocheński’s ethics.

Jacek J. Jadacki, Ph.D. (1977), professor emeritus of philosophy, the University of Warsaw, specialized in logic (with an emphasis on semiotics) and the history of Polish analytical thought. In the years between 1993 and 2001, he edited Filozofia Nauki [Philosophy of Science]; since 1998, he has been the editor-in-chief of the series Polish Analytical Philosophy. He is the author of studies concerning: semiotics in relation to ontology, epistemology, and axiology; the Lvov-Warsaw School (Twardowski, Łukasiewcz, Leśniewski, Ajdukiewicz, Dąmbska). Edward M. Świderski, Ph.D. (1978), professor emeritus of philosophy, the University of Fribourg, specialized in Russian and Soviet thought as well as twentieth-century Polish philosophy, with emphasis on phenomenology. For thirty years he edited Studies in Soviet Thought (beginning in 1992 Studies in East European Thought). He is the author of studies concerning: Soviet aesthetics and post-Soviet social and cultural theory; Ingarden’s ontology and aesthetics; Polish Marxism (Brzozowski, Kołakowski; the Poznań School), and J.M. Bocheński’s ethics.