Most people can't spot liars using eye contact or fidgeting—but three reliable verbal cues reveal deception instantly. Dr. Leanne ten Brinke, director of the Truth and Trust Lab at UBC, shares science-backed strategies to identify psychopaths, narcissists, and manipulators before they damage your life, plus seven proven rules for managing toxic personalities in work and relationships. Liars consistently provide fewer details and more vague information than truth-tellers, especially when caught off-guard; asking 'tell me more' reveals deception better than analyzing body language.