BrainteasersWho Went To The Cinema?
St. Dunderhead's School at Fogwell has a high reputation for hockey—but not so high a reputation for veracity. The First XI played a match at Diddleham recently, after which the girls were allowed to go to a concert. Miss Pry, the mistress in charge, collected the team afterwards; she saw ten girls emerge from the concert-hall and one from the cinema next door. When she asked who had been to the cinema, the members of the team replied as follows:
| Joan Juggins:  | "It was Joan Twigg." | 
| Gertie Gass:  | "It was I." | 
| Bessie Blunt:  | "Gertie Gass is a liar." | 
| Sally Sharp:  | "Gertie Gass is a liar, and so is Joan Juggins." | 
| Mary Smith:  | "It was Bessie Blunt." | 
| Dorothy Smith:  | "It was neither Bessie nor I." | 
| Kitty Smith:  | "It wasn't any of us Smith girls." | 
| Joan Twigg:  | "It was either Bessie Blunt or Sally Sharp." | 
| Joan Forsyte:  | "Both of the other Joans are telling lies." | 
| Laura Lamb:  | "Only one of the Smith girls is telling the truth." | 
| Flora Flummery:  | "No, two of the Smith girls are telling the truth." | 
Given that, of these eleven assertions, at least seven are untrue, who went to the cinema?

 
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