The expertise of the ignorant -- Mark Buchanan

I was just about to post something on the science of climate change -- and on how people form their opinions about it -- when I happened upon several must-read posts on a similar theme. Chris Mooney has two pieces (here and here) in the Huffington Post exploring how public opinion has "tipped" in recent years, bringing the urgency of climate change much more into mainstream thinking. And there's a wonderful post by Orac at Respectful Insolence looking at the bad arguments that get repeated interminably by climate change "skeptics" -- how can there be warming if it's so cold today?, etc. If Mooney's evidence is correct, then these skeptic red-herrings aren't standing up so well as they used to, which is a good thing.

Personally, I'd been stirred by Camille Paglia, responding to her readers. Paglia often says insightful things on any number of topics, but she seems to go off the rails when it comes to climate change. I'm not sure why. One reader, a self-proclaimed expert in nuclear design and atmospheric modeling took issue with Al Gore and the "hysteria" over climate change, and Paglia loved every word of it:

"Bravo for your invigorating deconstruction of current propaganda! I too am very concerned about the potential damage to Democrat credibility coming from the grab-bag Gore crusade, with its wild exaggerations and hypocritical sanctimony. It does make liberals look like ditzes -- the last thing the party needs in a presidential campaign where no-crap national security issues will be paramount. Environmentalism is of vital importance to our future, but it cannot be based on lies."

It's mysterious to me why concern over the Earth's future climate would make liberals "look like ditzes." Somehow it seems more likely that those who continue to deny any link between human activity and global warming, in the face of the consensus opinion of the worlds' scientists -- who've actually spent time studying the problem in great detail -- would be more deserving of ridicule.

But the skeptics clearly don't accept the idea that climate scientists might know more than the average citizen, or that their models deserve more consideration and weight than off-the-cuff observations of about local cold spells and the like. It's a peculiar view, and it raises an interesting point.

How do we make up our individual minds about any scientific issue, including climate change? Let's be honest. On almost any scientific issue, none of us has really investigated all (or even a little bit) of the evidence to the point of becoming an expert. Rather, we form our opinions by learning a limited amount, and by weighing the words and arguments and reputations of others. We're finite beings in a hugely complex world, and we really have no other choice but to learn (or attempt to learn) from others.

I've never performed careful experiments to test the principles of relativity, but I believe in it because I've worked through the logic of the mathematics, which has a beautiful coherence, and I've read the papers (or textbook discussions) documenting the important experiments that support the theory. And I've experienced the workings of the scientific process, which makes it in the interests of many others to point out any errors or mistakes in such experiments.

Suppose I were to ask Camille Paglia what she thinks about the prospects for, say, spintronics to be a commercially viable technology in the next five years (the idea is to design devices that would use the spins of electrons, not only their charges, to carry information). My guess is that she hasn't studied the latest papers in Nature or the Journal of Applied Physics describing key advances in the technology, and the hurdles that remain, and so to come to an answer she'd consult some experts. She'd call up physicists involved in the area, a range of theorists and experimentalists, and try to form some consensus of their views. She might try to read some review papers by those experts, and so on. This would be a sensible approach for anyone -- talk to some of the people who know.

I imagine that Paglia, or any other intelligent person, would use the same strategy in trying to come to an informed and accurate opinion on just about any scientific matter, ranging from the causes of deep earthquakes to the puzzle of high-temperature superconductivity. She knows that on these matters she doesn't know anything, but that there are people who've devoted their intelligence and energy for decades to building an understanding.

But then when it comes to climate change, suddenly everything changes....the scientists can't be trusted. Paglia and other skeptics don't look to the views of the IPCC, or to the vast majority of other climate scientists who express similar views (or see far more extreme outcomes as likely), but instead accept the slogans of those with obvious political interests, or the views of a very tiny minority of scientific skeptics.

Why is that? Frankly, I don't have an answer. But unfortunately, the very complexity of the climate system adds to the problem. It's easy for skeptics to make up some story about how its all the sun causing the warming, or how today's warming isn't anything special relative to the past, and so on. They offer up simple stories and explanations that stick in the mind. Meanwhile, it's not so easy for climate scientists to explain the results of computational models that for accuracy have to include a multitude of nonlinear feedbacks, and in many ways have become as complex and difficult to understand as the climate itself. There are no simple stories to tell. But that's the situation we're in, and this is the best science we currently have.

Richard Feynman had a great definition of science. "Science," he said, "is belief in the ignorance of experts." He was implying that science is not about accepting claims based on faith, or because they're proclaimed by some famous and esteemed professor, but because they're supported by evidence. Experts ought to be questioned and challenged, and they are, everyday, in the ordinary workings of science.

But belief in the ignorance of experts isn't the same as belief in the expertise of the ignorant, which is what the skeptics often seem to embrace.