Teacher: Jimmy, stand up.
Jimmy: *stands up*
Teacher: If there are 2 birds and I shot 1 of them, how many are left?
Jimmy: Zero.
Teacher: Are u thinking? There are 2 birds, I gunned one of them. How many are left?
Jimmy: Common sense. You gunned one and so the other one flew away. If your friend was by your side and he was shot, will you be just standing and do nothing? Common sense.
That's the reason why you can't apply math in reality.
