Kazimierz Twardowski’s Lvov Lectures in Logic. Based on the Polish Edition of Two Volumes of his Lectures

Kazimierz Twardowski is the founder of the Lvov-Warsaw School, from which many outstanding logicians emerged, such as Jan Łukasiewicz, Stanisław Leśniewski, and Alfred Tarski. Twardowski taught logic at this school from 1895 to 1926. Two volumes of various notes by Twardowski related to his lectures on logic delivered in Lvov have been published in Polish, and earlier his Viennese lectures on logic were also released. These documents constitute important material for studying the Lvov-Warsaw School and its founder. Historians and educators of logic, as well as proponents of a minimally formalized approach to logic, will also find them of interest. In this article, we will provide a general characterization of the edition and contents of the published notes for Twardowski’s Lvov lectures related to broadly understood logic, and we will outline the following issues: Twardowski’s understanding of logic, the state of research on it, and the question of the influence his approach to logic had on the scientific development of his students. We do not intend to discuss the full richness of the published documents.