premise: Pavel Sergeyevich Alexandrov (Russian: Па́вел Серге́евич Алекса́ндров ), sometimes romanized Paul Alexandroff or Aleksandrov (7 May 1896 – 16 November 1982), was a Soviet mathematician. He wrote about three hundred papers, making important contributions to set theory and topology.
hypothesis: Pavel Sergeyevich Alexandrov wrote in Russian.
reason: Pavel Sergeyevich Alexandrov was Russian, but we don't know what language he wrote his papers in. The algorithm assumes his written language preference by his nationality.