You know, Hitler could not understand the concept of "Zero". He just could not grasp it. I remember seeing an old Documentary that showed Himmler trying to explain it to him. Hitler was all frustrated. This was in 1939. Himmler said, "Look, Adolph, there are 25 million Jews living in Europe. If you were to kill them all you'd have "Zero"." And Hitler said, "Y'know, Heinrich, I still don't know what you're talking about, but I like where you're going..."