EVERYTHING YOU THINK YOU KNOW IS STILL WRONG... .Octopuses have two legs .Oranges aren't orange .Bats aren't blind .Napoleon wasn't short .Vikings didn't wear horned helmets .There is no such thing as a fish Just when you thought it was safe to start showing off again, the writers of the international bestseller The Book of General Ignorance are back with another lorryload of mistakes and misunderstandings.