premise: Evgeny Messner (Russian: Евгений Эдуардович Месснер , German: "Eugen Messner" ; 1891–1974) was a Russian professional soldier and military theorist.
hypothesis: Evgeny Messner (Russian: Евгений Эдуардович Месснер, German: "Eugen Messner" ; 1891–1974) was a Russian professional soldier and civilian theorist.