1. He worked 18 years in counterintelligence and learned that lying drains the brain’s energy fast. When you repeat a question after seven minutes, the liar must rebuild the fake story. Real memories replay smoothly, lies lag. The brain slips — tone changes, words shift, eyes flicker. 2. The trick is the 7-Minute Echo. You ask once, chat a bit, shift topics, then return calmly. The liar thinks the test is over and relaxes guard. When you circle back, the details don’t match because fabrication l