Passenger A: "He's a really intelligent bloke, he knows who invented to television and the telephone".
Passenger B: "How does he know that?"
Passenger A: "Well I know that they were both invented by Alexanders. Bell invented the telephone and a bloke called Alexander Yogi Bear - yes, that really was his name - invented the TV".
Passenger B: "And another clever Alexander was Fleming. He invented paracetamol".