The brilliant philosophical writer (and my old friend) Anthony Gottlieb has been ruminating on whether science should be sceptical about itself.
There is no full-blown logical paradox here. If a claim is ambitious, people should indeed tread warily around it, even if it comes from scientists; it does not follow that they should be sceptical of the scientific method itself. But there is an awkward public-relations challenge for any champion of hard-nosed science. When scientists confront the deniers of evolution, or the devotees of homeopathic medicine, or people who believe that childhood vaccinations cause autism-all of whom are as demonstrably mistaken as anyone can be-they understandably fight shy of revealing just how riddled with error and misleading information the everyday business of science actually is. When you paint yourself as a defender of the truth, it helps to keep quiet about how often you are wrong.
Very true. On scientific questions where I am orthodox (eg, alternative medicine, evolution), I notice that the heretics use precisely the same sorts of arguments as I do in those fields where I am a sceptic (eg, climate projections, crop circles). There seems to be no easy answer to the problem: when should you go for a heresy.
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