In 2008, a 100 Percent Chance of Alarm

?When judging risks, we often go wrong by using what's called the availability heuristic: we gauge a danger according to how many examples of it are readily available in our minds. Thus we overestimate the odds of dying in a terrorist attack or a plane crash because we?ve seen such dramatic deaths so often on television; we underestimate the risks of dying from a stroke because we don't have so many vivid images readily available.?