Uncertainty Rules (on Eyjafjallajokull, volatility and a patient’s prognosis)

Eyjafjallajökull, April 2010 (Wikimedia Commons, attr: David Karnå)

As pretty much anyone traveling in Europe this week can tell you, it’s sometimes hard to know what will happen next. Volcanologists – the people most expert in this sort of matter – simply can’t predict what the spitfire at Eyjafjallajokull will…