premise: Bullet Boy is a 2004 British drama film directed by Saul Dibb, written by Saul Dibb and Catherine Johnson, and stars Ashley Walters. The film’s original music was composed and performed by Robert Del Naja of Massive Attack, who released it as an album. The film is about a family in crime-ridden east London, the eldest son’s involvement in gun crime, and the effects of this on his younger brother.
hypothesis: Bullet Boy is about twin boys.
reason: Bullet Boy involves "the eldest son’s involvement in gun crime, and the effects of this on his younger brother," so it is not about twin [same age] brothers.