Or from the Mackenzie Brothers depending on your preference for tasteless burgers or some nice back bacon, hey hoser?
The quizmaster does not need to explain all the answers if something is a correct answer it is. It is not up to him to give proof for every answer. Only if someone comes with proof to the contrary you could say hey he should come up with evidence. But he isnt even obligated to do that. There are no laws against errors in a quiz, but yea in that case it isnt too weird to expect counter evidence.