Over at Gristmill, Andrew Dessler complains about the list of 400 sceptical scientists who seem to challenge the “scientific consensus”:
The question is: does their opinion matter? Should you revise your views about climate change accordingly?
The question is then, should scientific opinion matter? But in order to stop this question being turned back to the “consensus” scientists, Dessler makes an exception for them:
To understand why Inhofe’s claims are fundamentally bogus, consider the following scenario: imagine a child is diagnosed with cancer. Who are his parents going to take him to in order to determine the best course of treatment?
Dessler goes on use the tragic image of a hypothetical child with cancer, by saying that you would not take the child to any old doctor, but a specialist of a specialism.
Expertise matters. Not everyone’s opinion is equally valid. The list of skeptics on the EPW blog contains few bona fide climate specialists. In fact, the only criteria to get on the list, as far as I can tell, is having a PhD and some credential that makes you an academic. So Freeman Dyson makes lists. While I’m certain he’s a smart guy, I would not take a sick child to him, and I won’t take a sick planet to him either. In both cases, he simply does not have the relevant specialist knowledge. That also applies the large number of social scientists, computer programmers, engineers, etc., without any specialist knowledge on this problem. The bottom line is that the opinions of most of the skeptics on the list are simply not credible.
The trouble for Dessler is that the earth is not a child. And climate scientists are neither doctors, nor pathologists, let alone pediatric oncologists. Let us use, instead of a child with cancer, a happy little puppy dog. Somebody presents themselves as an expert, and tells you that the puppy dog is terribly, terribly sick. But you look at the puppy, and to you it seems to be perfectly normal. It wags and chases its own tail. It investigates every new object and smell, runs around, eats a bit, and falls asleep. You challenge the expert. He says that unless you do as he says, according to the computer model of a puppy he has devised, the real puppy will die in a horrible, horrible way, and it will all be your fault. Do you want to be a puppy murderer?
But since climate science and medicine are not the same thing, Dressler’s analogy breaks down. Doctors and vets in the world that the poor little puppy dog and the tragic cancer child inhabit, have not done clinical medicine degrees, just some very basic biology. No therapy has ever been tested. No diagnosis has ever been proved. In fact, nobody has ever seen a sick puppy, nor a case of cancer before. It is just the untested view of the experts that the child has cancer, and the puppy will die unless you make changes to the way you live your life. Such is the state of climate science in this world. Is the Earth really “sick”? It still spins. It still rains. It still works. Perhaps the expert has confused a change in the puppy’s behaviour with there being something wrong.
So given the critical nature of the climate change problem, who should we listen to? My opinion, and the opinion of all the governments of the world, is that we should listen to people who specialize in climate science. That’s the IPCC.
What is conspicuously absent from all of this debate about which scientists to believe?
Science. It’s the science, Stupid. Yet Dessler asks us not to consider the science, but who we would trust a dying child to. Yet it is not the case that even “most” scientists at the IPCC are climate scientists, but exactly the “large number of social scientists, computer programmers, engineers, etc., without any specialist knowledge on this problem” about whom Dressler complains. Dressler is wrong about the expertise of the IPCC. Neither is it the case that the IPCC scientists represent the “best in the field”.
For a long time, climate orthodoxy has hidden behind “the consensus”. Environmentalists have attempted to defend the idea of this consensus, because it has invested all of its currency in the fact of its existance. If the consensus doesn’t exist, how can the environmental movement proceed with legitimacy? We have already heard arguments about how this new group of scientists lacks authority, expertise, and how these scientists might be funded by Exxon Mobil. Anything but science. The consensus only exists by diminishing the moral character or professionalism of those who do not agree, not by allowing competing theories to be tested by the scientific process. If it carries on like this, the environmental movement will prevent science from being part of the process which forms the scientific consensus on the climate.
Climate science will eat itself, tail first. It is a sick puppy.