premise: Major General Senén Casas Regueiro (30 July 1934 in Bombí - 6 August 1996) was a Cuban politician. He was the Cuban Minister of Transportation from 1989 till his death. He was also the First Deputy Minister of Defence and the Chief of Staff of the Cuban Army. He was a brother of another Cuban politician Julio Casas Regueiro.
hypothesis: Julio Casas Regueiro had two brothers.
reason: Julio Casas Regueiro had at least one brother, but it's uncertain if there was more than one. The system is probably confused by the first brother.