George Watson arranges an emergency that proves to his wife that their nursemaid robot Robbie is good for their child. What is the emergency, and why does Mrs. Watson agree to keep Robbie even though she knows the crisis was pre-arranged?

The Cutie robot develops a belief system that prevents him from obeying technician Gregory Powell’s commands, but Powell decides that is ok. What is Cutie’s philosophy, and why does his disobedience not matter?

Of the Three Laws of Robotics, which is most important, and why? What is it about the other two laws that prove they are secondary?