This paper is about nonclassical theories of truth in Poland at the beginning of the 20th century, both in the Lvov-Warsaw School and outside of it. I shall concentrate on two philosophical approaches which in my opinion are interesting but not commonly known most likely because the relevant papers were written only in Polish: Władysław Biegański's, whose theory is based on biological evolutionism, and Edward Poznański and Aleksander Wundheiler's theory of truth in physics.