Conversation

Imagine an advanced alien life form that materializes on Earth in the middle of a popular dance club. The alien has a cloak of invisibility and observes the humans dancing. He is here to watch and learn. My question is this: Would the alien ever learn to distinguish good dancers from poor dancers?

Now suppose the alien leaves the club and finds a bar that is open late. He observes a lot of what we call "conversation" happening. The alien's universal interpreter device allows him to understand...