@maldr0id Years ago I read a sci-fi novel that was called, I think, „The truth machine“ and was set in a future where a ring would be able to tell if somebody was lying. But the rest of the book was more about nanobots used to clone the protagonist‘s dead wife. Wonder why they never turned it into a movie.
Oh right. Because the „wife“ was cloned to be a child while the protagonist would use nanobots to stop him from aging until his new „wife“ had cought up with him. Ewww.