A professor agrees to review a manuscript that is under consideration for publication at a journal. He has promised to keep the paper and its contents absolutely confidential. When he reads it, however, he realizes that his student’s experiments will never work; the paper shows that they are futile. Does he keep mum, or does he break the confidentiality rule and tell his student what he just learned? —Ethics 101: A Course About the Pitfalls (NYT (Registration; link will expire))
Another good suggestion from Jim.