and you still wanted to kill her. And I don't understand it, and I never will. PM: Okay, there's no doubting the veracity of those emotions. Now the technology around what the truth looks like is progressing on, the science of it. We know, for example, that we now have specialized eye trackers and infrared brain scans, MRI's that can decode the signals that our bodies send out when we're trying to be deceptive. And these technologies are going to be marketed to all of us as panaceas for deceit, and they will prove incredibly useful some day.