Mr. Jonathan ran an assembly yesterday, Monday 23rd August, on trust. He got both students and staff to play a game known as 'prisoner's dilemma', a situation in which two players each have two options whose outcome depends crucially on the simultaneous choice made by the other, often formulated in terms of two prisoners separately deciding whether to confess to a crime.
In our case, they had to decide whether they would share a sum of money or not. If they both chose 'share' they would split the money, if they both chose 'keep', neither would get anything. If one chose 'keep' and the other 'share', then the one who chose 'keep' would get all the money. See below.