Sorry, you're right about number 3, I accidentally added that into my post, but you are wrong about 4. He asked for the Prime Minister at the BEGINNING of World War II, not at the end. The correct answer is Neville Chamberlain. And 13 you're wrong, it wasn't Bo, it was John, because it says that everyone makes atleast one true statement. No one said that John didn't steal it, so he stole it.
And about 15...why don't you disprove it then. :P