premise: We Joined the Navy is a 1962 British comedy film produced by Daniel M. Angel and directed by Wendy Toye which stars Kenneth More, Lloyd Nolan, Joan O'Brien, Derek Fowlds, Graham Crowden, Esma Cannon and John Le Mesurier. It was based on the novel of the same name by John Winton.
hypothesis: We Joined the Navy stars more than 7 actors.
reason: We can't know if those are the only stars. 7 are listed, perhaps that is all of them, perhaps there are more. The system assumes otherwise.