Nicolai Alexandrovich Vasiliev, also Vasil'ev, Vassilieff, Wassilieff, was a Russian logician, philosopher, psychologist, poet. He was a forerunner of paraconsistent and multi-valued logics.
- Occupation
- mathematician, philosopher, writer, psychologist
- Citizenship
- Russian Empire, Soviet Union
- Born
- June 29, 1880
- Died
- December 31, 1940
