 This final remark reveals the motivation of Łukasiewicz’s drive to replace the old bivalent logic with the new trivalent one. It was in order to defend indeterminism and freedom. In fact the idea had come to fruition some three years earlier. Having been appointed to an administrative position in the Ministry of Education in 1918, and being about to leave academic life for an indefinite period, Łukasiewicz delivered a “farewell lecture” to the University of Warsaw on 17 March, in which he announced dramatically, “I have declared a spiritual war upon all coercion that restricts man’s free creative activity.” The logical form of this coercion, in Łukasiewicz’s view, was Aristotelian logic, which restricted propositions to true or false. His own weapon in this war was three-valued logic. Recalling his 1910 monograph, he notes that: