You may have heard of “evidence-based medicine,” the notion that medical decisions should be based on clinical research and evidence. What scares me about the term is the implicit suggestion that medicine is currently based on something other than evidence. The same squeamishness occurs when I hear the term “evidence-based consulting,” which was used in a recent article in Consulting magazine. The lead author is Ray Hill, who heads consulting for IMS Health, a company better-known for collecting data on the drugs your physician prescribes.