Jose Duarte continues to mine a productive seam on the shameful behaviour of, on the one hand John Cook and his team, and on the other Stephan Lewandowsky. His post a couple of days ago was on the subject of the true value of the climate consensus and he puts the proportion of climate scientists who think that most warming is caused by carbon dioxide at 80%. I had previously thought that the true figure was around the 75% mark, so we are in the same ballpark.
But as Judith Curry points out in an update to Jose's post, this is all slightly beside the point. Many or even most of the the people who call themselves climate scientists are not actually working on anything relevant to the question at hand - they are specialists in impacts and responses and the like. They only believe that most warming is caused by carbon dioxide because their colleagues specialising in the atmospheric sciences tell them so.
The proportion of atmospheric scientists who adhere to the consensus appears to be a little over half according to the same update. But even then, we have to wonder if someone who is working on, say, atmospheric chemistry is getting his opinions on the extent of human influence from the tiny number of people who are working on detection and attribution - a couple of dozen was Mike Hulme's estimate if I recall correctly.
And even then we have to ask how this tightly knit group arrives at the conclusion it does about the proportion of warming that is manmade. Of course the answer is with climate simulations, leavened with parameterisations, assumptions and fudges, and larded with unknowns, both known ones and unknown ones.
The idea that most of the warming at the end of the last century was human caused is not in itself stupid. The stupidity referred to in the title of this post is that a consensus formed by people who know little of a subject, based on the opinions of a tiny group of people who claim to have discerned the truth from a simulation of an impossibly complex system, has any meaning or relevance to the public policy debate.