As you teach, you learn*

'You're fired' – Edinburgh University is panned after Apprentice's error
The university's academic standards were called into question in front of about seven million viewers in the wake of a major error by one of the show's competitors, an Edinburgh graduate. The insult came after Michael Sophocles, a history and classics graduate, was shown to believe that poultry he bought in a Moroccan market was kosher because it had been blessed by a Muslim shopkeeper.

The embarrassing moment was seized upon by Sir Alan Sugar and Margaret Mountford, one of his advisers, who declared that Edinburgh University had clearly lost some of its academic lustre.
Old Jewish saying.