Kazimierz Jerzy Skrzypna-Twardowski, Ritter von Ogonczyk (b. October 20, 1866 in Vienna, Austria - February 2, 1938 in Lwów, Poland) was a Polish philosopher and logician.

Twardowski studied philosophy in Vienna with Franz Brentano and Robert Zimmermann . In 1891/1892 he received his doctorate with his dissertation Idee und Perzeption (Idea and Perception) and in 1894 his habilitation thesis Zur Lehre vom Inhalt und Gegenstand der Vorstellungen (On the Doctrine of the Content and Object of Presentations). He lectured in Vienna in the years 1894/1895 and then was appointed professor in Lwów (which at the time was still in Austria).

There Twardowski established the Lwów-Warsaw School of logic and became the "father of Polish logic", beginning the tradition of scientific philosophy in Poland. Among his students were the logicians Stanisław Leśniewski, Jan Lukasiewicz and Tadeusz Czezowski , the historian of philosophy Wladyslaw Tatarkiewicz, the phenomenologist and aesthetician Roman Ingarden , as well as philosophers close to the Vienna Circle like Tadeusz Kotarbinski and Kazimierz Ajdukiewicz.

Works

• Wyobrażenie i pojęcie (1848)
• O tzw. prawdach względnych (1900), O psychologii, jej przedmiocie, zadaniach, metodzie, stosunku do innych nauk i jej rozwoju (1913)
• Rozprawy i artykuły filozoficzne (1927)
• Wybrane pisma filozoficzne (1965)
• Wybór pism psychologicznych i pedagogicznych (1992)
• Dzienniki (1997)
• On Actions, Products and Other Topics in Philosophy (1999).

Related articles

• School of Brentano
• Lwów-Warsaw School of logic
• Polish logic