A: Have you been cheating on your wife?
B: No! I would never cheat on my wife!
A: But I observed you cheating on your wife.
B: You fool! I never cheated on my wife until you observed it!
A: I... I'm so sorry.
B: YOUR INTERFERENCE HAS DESTROYED MY MARRIAGE.
RECTANGLE: This has been another episode of "Quantum Entanglement Theatre." Next week: B accuses A of hiding mass.