premise: Memento is a 2000 American neo-noir psychological thriller film directed and written by Christopher Nolan, and produced by Suzanne and Jennifer Todd. The film's script was based on a pitch by Jonathan Nolan, who later wrote the story "Memento Mori" from the concept. It stars Guy Pearce, Carrie-Anne Moss, and Joe Pantoliano.
hypothesis: Memento was written and directed by two different individuals
reason: it states it was written and directed by the same person, Christopher Nolan