Best example ever. Give that Professor a medal.
Anatomy of a Rumor: The Story Behind Chief Justice John Roberts's 'Retirement' - Above the Law - A Legal Tabloid - News, Gossip, and Colorful
Commentary on Law Firms and the Legal Profession: "Today’s class was partially on the validity of informants not explaining their sources. [Professor Tague] started off class at around 9 am EST by telling us not to tell anyone, but that we might find it interesting that tomorrow, Roberts would be announcing his retirement for health concerns. He refused to tell anyone how he knew. Then, at around 9:30, he let everyone in on the joke.
Note the timestamps on the Radar posts. The first one came out at 6:10 a.m., i.e., the Pacific Time equivalent of 9:10 a.m. Eastern time. The retraction came out at 6:36 a.m., i.e., the
Pacific Time equivalent of 9:36 a.m. Eastern — shortly after Professor Tague let his class in on the joke."