Deception shows up across species; humans are not special for lying. What does not add up is truth bias: you lie, yet you still default to believing the next story you hear. That gap scales from wiring in your brain to orgs and AI when lies pay and nobody checks. The fix is to treat truth bias like a wiring defect: fact-check by default, use AI and audits to make lies costly, and let the brain update only after checking becomes normal.