A close friend calls you on the phone and confides a personal secret. That night you write the secret in your diary. A few days later your friend is furious with you because the friend overheard someone on campus talking about the secret.

For each of the following situations, invent at least three hypotheses aimed at explaining what went wrong or at solving the problem. Then, for each hypothesis, describe one or more experiments or inquiries that would confirm or disconfirm the hypothesis.