The one phrase I have not heard in any debate over government policy in my lifetime is: "I don’t know." From the Cuban missile crisis to the latest debates over heath care, Republican and Democratic administrations alike have never encountered a question for which they have no answer.Both Democrats and Republicans "knew" that if Vietnam fell, the rest of Southeast Asia would become communist. It didn’t happen.The same folks "knew" the Russians wanted to occupy Disney World or nuke it out of existence.