Generations of medical school students have been told: “Half of what we taught you is wrong; the only problem is we don’t know which half.” The point is that no one, not even the world’s top medical scientists, can determine absolute truth. Yet, fact-checkers were tasked with just this, and in their effort to do so they confused confident expert opinion for facts, when expert opinions are not facts. Indeed, even a consensus of medical experts is not a fact.
