Existing lie detectors use a bunch of information like pulse, and galvanic skin response. Presumably this device is not hooked up to people enough to do that, s

Existing lie detectors use a bunch of information like pulse, and galvanic skin response. Presumably this device is not hooked up to people enough to do that, so I don't think it's using the exact same metrics. Also, polygraphs work decently well actually. Just not well enough to be used as evidence in court.