¡°I¡¯d like to buy a new boomerang please. Also, can you tell me how to throw the old one away?¡±

Never mind whether you think that joke is funny. Do you think your best friend would like it?

You might think you know the answer; after all, people like each other partly because they make each other laugh. At the very least, you might be confident that a mere machine, equipped with data about how other people react to jokes, couldn¡¯t do better than you in answering the question of what your best friend will find funny.