 The work of Vasil’év or Orlov did not make any impact at the time. The first (formal) logician to have developed paraconsistent logic was Jaśkowski in Poland, who was a student of Łukasiewicz, who himself had envisaged paraconsistent logic in his critique of Aristotle on the LNC (Łukasiewicz 1951). Almost at the same time, Halldén (1949) presented work on the logic of nonsense, but again this went mostly unnoticed.