Ten years ago, I took an American history course at the local college. An elderly woman, probably close to eighty years old, answered an essay question, and got points taken off for 'historical errors'. The complained to the instructor that the book was wrong, and she was right. She claimed, "After all, I lived it". He gave her the credits back. I don't recall the essay question, but it had something to do with America during WWll. Sometime later, he told the class she was right, and the book was wrong.