From Dirk Gently

The Electric Monk was a labour-saving device, like a dishwasher or a video recorder. Dishwashers washed tedious dishes for you, thus saving you the bother of washing them yourself, video recorders watched tedious television for you, thus saving you the bother of looking at it yourself; Electric Monks believed things for you, thus saving you what was becoming an increasingly onerous task, that of believing all the things the world expected you to believe.

In the book, an alien ship crashed on earth, the crew asked an electric monk if their ship was repaired. The monk responded that it believed it was, the aliens tried to take off, and then the ship exploded because it wasn’t actually repaired.

In Hitchhiker’s Guide, Genuine People Personalities were AIs that tended to be obnoxiously cheerful, neurotic, or hyperactive. Doors with a GPP would sigh with pleasure when they opened and loudly ask if they did a good job if someone told them to open quietly, for example.