The biggest mistake on Polymarket has a name - and a mathematician figured it out 80 years ago During World War II the military came to a mathematician with a simple question - where to add armor on the bombers Abraham Wald wasn't even American - a Jewish man from Budapest who fled the Nazis to New York with no money and no language The military showed him a map of bullet holes on planes that came back from combat Engines almost clean, fuselage and wings full of holes The generals said: reinforce the fuselage and wings, that's where most hits land Wald said the opposite - reinforce the engines The generals thought he was insane His logic: you're only seeing planes that made it back. The ones that took a bullet to the engine never returned at all. You're looking at survivors and drawing conclusions from the wrong sample They called it survivorship bias - and the idea changed statistics forever Wald never saw a single battle, never flew, never held a weapon He just saw what no one else could see in the data // On Polymarket you see the winners and copy their bets But you don't see the thousands who bet the same way and lost The price on the market is the opinion of those who stayed, not those who got wiped out The edge isn't in following the crowd - it's in understanding what the crowd can't see