Was Leśniewski a Philosopher?

Abstract

The answer to the title question will be different depending on the weight attributed to the particular criteria of being a philosopher. So-called true philosophers will think for sure that the data presented in the text do not suffice to count Leśniewski as one of them, since he did not make a study of the <>. The author's opinion is entirely different. Leśniewski was a philosopher, because he graduated in Philosophy, he was interested in philosophy and has expressed those interests for whole his life; he worked within the institutional framework of philosophy, had original philosophical ideas, has influenced the development of philosophy and has been regarded as a philosopher.