Evidence-based Medicine

Good article on "evidence-based medicine" (EBM) here:


http://tinyurl.com/yaowus9

I would only add though that even the "double-blind randomized clinical trials," cited as the highest level of evidence, can still be marred by imprecision and uncontrolled (often undefined or unrecognized) intervening variables, and ought be interpreted with caution, especially if sample size is small.  No matter how strictly one endeavors to define it, "evidence" often remains inevitably in the eye of the beholder.