Gai-do is a rational spacecraft built by the inventor Sanao Gai from the planet Wester. The ship’s name means “Gai’s Brother.” Small in size and outwardly resembling an acorn, the ship is an artificial intelligence possessing all the qualities of human thinking—emotions and a sense of humor included. It can see both inside and outside of itself using video cameras and speak with a human voice.
The ship’s intelligence at first throws witnesses into shock. Soon Sanao Gai’s technology became known on Earth; in the novel “War with the Lilliputians” a patrol craft with similar traits appears: it talks, argues with passengers, and even jokes.