It is the beauty of evidence-based medicine (EBM) that a scientist can at once be a Pope and a Galileo. His transmutation is as effortless as it is discretionary. If you think you've met Galileo – a rebel, a free thinker, a rocker of the establishment – the following week he is a Pope, castigating detractors, censoring critics, and celebrating uniformity. He changes by a roll of the dice. His change is decided by a quirk in hypothesis-testing known as statistical significance. If the p value is 0.051 he is Galileo, if the p value is 0.049 he becomes the cardinal. He is one day a raging skeptic and another day a true believer.
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