From the New York Times obit for Chris Haney, co-creator of Trivial Pursuit:

“Mr. Haney fought and won a 13-year legal battle against a man who said he had given him the idea for Trivial Pursuit when Mr. Haney picked him up hitchhiking. He won another suit against an author who claimed that Mr. Haney had taken questions from his books, something Mr. Haney readily acknowledged.

The judge’s reasoning: “You can’t steal trivia.”