One of my high school students who was an ex detective taught my class how to beat them.
He said put a thumb tack in your shoe, and when asked each question, step on the tack slightly, enough to cause pain. A lie registers as a blip, but so does pain. If every question has a blip, they cannot differentiate.
He said put a thumb tack in your shoe, and when asked each question, step on the tack slightly, enough to cause pain. A lie registers as a blip, but so does pain. If every question has a blip, they cannot differentiate.