An overriding feature of the climate debate is the constant attempt to intimidate policy makers, in some cases successfully, with the mantras of “follow the science” and “the science is truly settled”. The purpose is to create the impression that there is really no room for argument; this is not really a public policy issue; it is one on which the experts have spoken, and we would all be quite daft to do other than follow the prescriptions, it is asserted, which flow automatically from the scientific findings.