An architect, a mathematician and a musician are in the pub with their dogs, arguing which is the most intelligent.

The architect takes a handful of dog biscuits, throws them on to the floor and points to them. His dog runs over to them, pushes them around with his nose and as he returns to his owner everyone can see that he's left them in the shape of St Paul's Cathedral.

The mathematician gives his dog an order, he runs over to the biscuits and rearranges them so that they form the symbols e=mc².

The musician pokes his dog with his foot. The dog wakes up, looks around, stretches, scratches himself and farts, shags the other two dogs, eats the biscuits and then says 'OK, where's my cheque'.