Nicolai A. Vasiliev

Nicolai Alexandrovich Vasiliev (Russian: Николай Александрович Васильев), also Vasil'ev, Vassilieff, Wassilieff (11 July [O.S. 29 June] 1880 – December 31, 1940), was a Russian logician, philosopher, psychologist, poet. He was a forerunner of paraconsistent and multi-valued logics.

Vasiliev was born on June 29 O.S., 1880 in Kazan, Russia. His father, Professor Alexander V. Vasiliev, was a fairly well known mathematician, his grandfather was the outstanding sinologist Professor Vassily P. Vasiliev, and his great grandfather was the prominent astronomer Ivan M. Simonov, who was a close colleague of Nikolai Lobachevsky.

Wanting to be a psychologist, Vasiliev studied at the medical faculty and the historico-philological faculty of Kazan University (1906), where he was offered the position of privat-dozent.

As a university student, Vasiliev was enthusiastic about symbolist style poetry and published some books of verses of his own (for example,"The longing for eternity") and translations of the poetry of Emile Verhaeren and Algernon Charles Swinburne.

Although Vasiliev outlined an abstract to the article on the "logic of relatives" by Charles Sanders Peirce as early as in 1897, it was only in 1908 that he entirely devoted himself to logic.

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