There was a text version transcript of a reputed out-take from "Have I Got News for You" in which Paul Merton and Angus Deayton mercilessly expose Jimmy Savile as a man who has interfered with under-aged girls and deterred investigation with threats. It circulated widely on the Internet in the 1990s and beyond. This has since proved to be a fake. But the question remains - if it was a fabrication, how come the person who wrote it knew in so much detail what now appears to be the truth?