A man created fifty robotic clones of himself. They where exactly alike with the same voice same skin color and other stuff. One day the man committed a crime and had to go to court but he brought all of the robot clones with him. The judge successfully found the real person.
How?
The judges put a glass of water and some food used a spy camera and didn't let them go back home. The judges left and the court closed. So, the man thought it was safe to drink the real man drank the water but the spy camera discovered the real man. Robots don't drink.