text: A reasion this could be a good idea is becaues you be able to tell if some one is lying to you. Like if there is a bad persion in court and you wont to know if there lying to your face you just look at the machine and it would tell you. Though some people would like to keep some things a scorit you be able to tell is there lying to you and if there sad as well then you know its a secorit. Many people would be saved and devastated by this machine.