This App Tells You The Probability Of Your Plane Crashing

'Rational expectations' is a term commonly thrown around by economists trying to work out why people do stuff. It's based on the idea that individuals weigh up the pros and cons of a certain action, and use that to make a decision. It's one of the fundamental underpinnings of a free market economic model, but as this app proves in miniature, it's also bullshit.