–Knock, knock-
–Who’s there?
–Hi. Â I’m an alien from another galaxy
–I’m so glad you speak English
–Actually, my species has developed a universal translation device. Â But don’t ask me how it works?
–Wow. Â I guess your species must be way smarter than us people on Earth
–Please! Â Is the Pope a Catholic?
–Well, yes . . . Oh, I bet that’s an example of your devise translating a great cosmic truth into something that even I can understand.
–Exactly!  Wait a moment.  My friend here wants to tell you a joke.  It’s a knee thumper, although I don’t myself have any  knees to thump . . .
If the universe started off with a Big Bang, and no one was there to hear it, did it really make a bang?
 .  .  .
