Harry went out to dinner with his friends Larry, Barry, and Gary. Harry sat across from Gary. At Gary’s right, opposite Barry, sat Larry.
When the waiter came for their orders, Larry and Barry ordered steak. Gary chose fish, and Harry (who likes to be difficult) ordered like this: “Unless the man at the left of the man opposite the man who ordered fish is not having what the man across from the man at the right of the man at my left is having, then I’ll have what the man across from the man at the right of the man opposite me ordered. Otherwise, bring me the Fettuccine Alfredo.”
Assuming “right” and “left” is from the viewpoint of the diners, what did Harry order?
What Harry essentially said to the waiter was: “If Larry ordered the same thing as Gary, I’ll have steak.” Since Larry ordered steak and Gary ordered fish, Harry gets Fettuccine Alfredo.