Cognitive biases: why a smart brain makes the same mistakes every time

Nobody believes Gandhi lived to 140. Yet ask people if he died before or after age 140, and their guess of his age at death comes out 17 years higher than when you ask about age 9. A smart brain does this because it takes shortcuts: right most days, and wrong in the same way every time. Watch seven of those mistakes at work in one ordinary choice, buying a used car: anchoring, the availability bias, confirmation bias, framing, loss aversion, the sunk cost fallacy and hindsight bias. At the end, a harder question: why knowing their names is not enough.