Norman: But there was no explosion.
Harry Mudd: I lied.
Kirk: He lied. Everything Harry tells you is a lie. Remember that. Everything Harry tells you is a lie.
Harry Mudd: Now, listen to this carefully, Norman. I am lying.
Norman: You say you are...lying, but if everything you say is a lie then you are telling the truth but you cannot tell the truth because everything you say is a lie but you lie, you tell the truth, but you cannot for you lie. Illogical. Illogical! Please explain. You are human, only humans can explain their behavior. Please explain.
Kirk: I am not programmed to respond in that area.