So it's a hundred years in the future and you have a robot manufacturing business where you make robots for all kinds of uses. You want to build a robot that will sweep floors all day long, mop and buff them after closing hours. Thing is, it's terribly boring work.
You know if you use a complete AI software package the robot will get bored and do a lousy job, but if you purposefully mentally handicap the AI, it will blissfully sweep the floors all day long. When it comes to sweeping floors, intelligence is a bad thing.
Is it morally right to build a mentally handicapped AI?