You have been the very picture of prudence. You run every important decision by your primo outside counsel so that, if anything goes wrong, you have a chip shot "advice of counsel" defense. Well, something has gone wrong. Your tax shelter goes awry. Your securities filings are attacked. Your internal investigation is challenged. Your interpretation of a contract is held in bad faith. Your lawyers send in the A-team litigators for your defense. So far, so good. But wait! The plaintiff has subpoenaed your trial lawyers' firm? What's this business about implied waiver?