Q: Why is a laser beam like goldfish?
A: Because neither one can whistle.
That was a line from Mike, the joke-telling computer in Robert Heinlein's classic novel, The Moon is a Harsh Mistress. Reading this book made me curious about the current state-of-the-art for computer generated humor. And what, if any joke apps might be available for my iPhone.
Joke-telling computers are still an area of active research. What we'd really like…