Any politician faced with the challenge of protecting the public from a natural threat, such as a pandemic or climate change, will be keen to stress how much they are ‘following the science’ — by which they mean they are guided by the dominant scientific narrative of the day. We would want this to be the case because we trust the scientific method as a selective process that ensures bad science cannot hope to survive for very long. This is not a reality I choose to ignore here, but it...