The robot psychologist said: "Suppose the transformed robot throws a heavy object from someone, as long as he knows that he has enough strength and reaction speed to catch it before it hits that person, he will not violate the first law. However, once the weight leaves his hand, he is no longer a moving medium, only blind gravity is at work, and then the robot can change its mind. As long as he does nothing, he can let heavy objects fall, and the revised first law allows this action. "
Extended data
At the beginning of "Disappear Without a Trace" in I, Robot, it is mentioned that even if the robot understands that a human is working in a place that looks extremely dangerous but won't be hurt, the robot will still stop him. If the robot does nothing, the first law will still be implemented, which will bring great trouble to human work. If not, there will be no revised robot and this edge ball behind.
Susan designed a scene in which a person was sitting in a chair with a heavy object on his head. When it falls freely and is about to hit this person, it will push away the heavy object (the robot doesn't know), while the robot is sitting on the other side of the chair with a cable in front of it, on the only way to that person. When it touches it, it will die, but when the weight falls, it will be cut off (the robot doesn't know)