The Double-Bind of the Incompetent

As Bertrand Russell once put it, the trouble is that "the stupid are cocksure."

We've all encountered them: people who think a talk argument they just made up, be it regarding quantum mechanics, the origin of life, climatology, or (to pull an example from my e-mail box), numerological connections in cosmology, trumps the intellectual "heavy lifting" and rigor of scientists building on the work of previous scientists.

It strikes us as hubris, or even dishonesty. As scientists we see this behavior not merely as being incorrect but as a manifestation of a moral failing. Perhaps that is so and perhaps it is not; regardless, a study by Justin Kruger and David Dunning, published in the Journal of Personality and Social Psychology, shows this lack of insight to be universal among the incompetent.

Kruger and Dunning had student volunteers (given extra credit) take the logic portion of the LSAT, a grammar exam, and a "test" in which their rating of the quality of jokes was compared to that given by professionals, and also rate their performance on each. On all three, the low performers assessed their own performance as being above average. Top quartile performers underestimated their own ability, but they revised their assessment after grading five others' grammar exams. The bottom performers gained no insight from grading their peers' exams; they were unable to recognize better work when they saw it!

It may be "old news"--the paper dates to 1999--but it is particularly rich, with more insights than I've summarized here. Among other things, it provides some insight into the obstinacy of the armchair global warming denialist, HIV/AIDS denialist, or quantum-mechanics contrarian. Not only are they ill informed, but they are unable to recognize expertise. Read the full article (which may be behind a pay wall) for more.

"We have foregrounded the redistributional dreams of "social justice" over heroic aspirations to discover, invent, and thereby create new wealth..."

Peter Wood, of the National Association of Scholars, has a brilliant essay in this week's Chronicle of Higher Education connecting American high culture's obsession with identity and diversity to the drought of native-born scientists and engineers.

The science "problems" we now ask students to think about aren't really science problems at all...a society that worries itself about which chromosomes scientists have isn't a society that takes science education seriously.

This is bound to anger precisely those who deserve it. A defense of merit, achievement, and a call for culture to respect merit and achievement is long overdue.

What's happening to Bangladesh?

Hearing climate contrarians called "skeptics" is, to my ears, like nails on a chalkboard. Not only is there a tendency to fumble about looking for evidence or any argument, good or bad, in support of a predetermined conclusion--the opposite of a skeptic's behavior--but when it comes to evidence supposedly in favor of their position, they more often than not act more like simpletons.

Consider the latest fad in the denialosphere, a pop report on land accretion in Bangladesh. (Of course, the buzz is not about a scientific paper. Denialists don't usually read those, and tend to kick and scream when one insists they must!) It has been widely predicted that sea-level rise will inundate low-lying areas of Bangladesh, but, currently, sedimentation is adding 20 km^2 to the country, annually.

To hear it from Paul Biggs on Jennifer Marohasy's 'blog or CLS at Classically Liberal, this is proof that sea-level rise will not inundate Bangladesh at all, that the IPCC and unnamed predictors of "catastrophists" are wrong, wrong, wrong.

This is nonsense, and it's so patently nonsense that one wonders if Biggs and CLS have any shame at all. Sedimentation and sea-level rise are competing effects: that one and not the other currently determines the sign of land-mass growth doesn't mean that it will always determine that sign. Let's take Paul Biggs' number as gospel for a second, that the IPCC predicts that 17% of Bangladesh will be under water by 2050. (What the IPCC predicts--and what it means for the IPCC as opposed to an individual group's paper to predict anything--is, of course, more complicated than this.) Bangladesh has an area equal to 134,000 km^2 according to the CIA World Factbook 17% of this is 22,780 km^2, far more than 20 km^2/year times 42 years, or even the Yahoo report's sanguine 5000 km^2 of "reclaimed" land.

Comparing percentages is not, of course, the way to go about this problem; one needs a model of land accretion during a time of sea level rise. Neither Mahfuzur Rahman nor Maminul Haque Sarker, the scientists/engineers cited in the Yahoo article, are working is not working with one, and neither are the denialists. At worst, I'm being no more flimsy than the wannabe "skeptics"; the comparison is good for a rough estimate and I have better things to do with my time than change field of study.

What's incontrovertible is that Bangladesh is already feeling the effects of rising sea levels, mainly through saltwater pollution of soils an aquafiers. See the IPCC AR4 WGII report for discussion and references. (I'd put 5-1 odds on the denialists not looking at the IPCC report at all!)

But maybe I'm wasting my time even without changing field of study. CLS talks of a "Church of Saint Al" as though the tail is wagging the dog and climate scientists are taking marching orders from a mere popularizer. And he gives hints that, like Ronald Bailey prior to his Road to Damascus moment, he's choosing a position on a scientific question based on what he wishes public policy to be, a dishonest practice. To quote:

Well that technology costs money and that means an improved economy and that means more carbon emissions so that can’t be allowed.

Yep, it's the usual Bircher-esque paranoia, the party line from glibertarians who talk a lot about free markets but lack the imagination to put such markets to use: Improved economies mean more carbon emissions, economic growth can't be carbon-neutral or carbon-negative or happen in a cap-and-trade framework. You can either have economic growth or you can stop fouling the nest. Want prosperity? Then take unlimited global warming and ocean acidification.

Now there's a teenage pinko's dream argument! "Capitalism and economic growth can only survive by fouling the nest."

A serious deficiency in the introductory physics syllabus

With one lecture left in my non-calculus "College Physics" summer class, I gave the students a choice of covering oscillatory motion and sound or free energy with two applications to biological physics. The vote was unanimously for the latter.

To my surprise, their textbook (the latest edition of Sears and Zemansky's College Physics by Young and Geller) has no mention of free energy, nor do the six other introductory physics textbooks (calculus-based or not) on my office shelf.

A "water cooler poll" shows that nobody teaches about free energy in their introductory class. One grad student said he didn't see the topic at all as an undergrad! We teach students the Second Law of Thermodynamics, but not any of its practical consequences. Stock homework problems consist of ridiculous irrelevancies such as computing entropy produced by a falling parachutist.

Free energy is perhaps the most useful idea we could teach life-science majors, and it provides a foundation for understanding chemical kinetics and entropic forces such as osmotic pressure, polymer elasticity, and the hydrophobic effect. Most of them hear it as a term in their general chemistry class, and even use it to predict the direction of chemical reactions, but they'd have to take physical chemistry to really begin to understand it.

Could someone please explain to me why it's so universally absent from the syllabus as to be excluded from textbooks?

Toward market control of agricultural runoff.

"Way back in the day", when I was still seemingly suffering from or perhaps just getting over the loutish aversion to environmentalism that free-marketeers catch like the flu, I remarked on Dani Wenner's long-defunct liberty-news.com (revived thanks to archive.org) about the inability to rein in the Gulf of Mexico's Dead Zone through traditional means like emissions bans or the tort process, noting that perhaps some market-based solution could be brought to bear.

I lost sight of the issue between then and now, until the Nature Conservancy's newsletter brought it back to my attention. That ever-innovative group, having concluded a paired-watershed study exploring different means to buffer waterways, has begun a pilot program which may be a major step toward the institution of markets in wetlands' ecological services. To quote:

Faced with spiraling land-acquisition costs, the Conservancy is exploring how environmentally friendlier practices might be woven into existing farming operations. On the Mackinaw River, a tributary of the Illinois River, the Conservancy is carrying out a pilot program to test the feasibility of “nutrient farming.” Conservancy staff have built micro-wetlands at the ends of farm fields to catch nutrient-laden water before it reaches the river (in the wetlands, many nutrients are either taken up by plants or metabolized by bacteria and then released into the air).

Nutrient farming could form the basis of a market modeled after an existing cap-and-trade system that has helped curb emissions of the pollutants that cause acid rain. Farmers could be paid for nitrogen and phosphorus they take out of the water with micro-wetlands, reducing the overall nutrient load flowing to the Gulf of Mexico.

Ben Stein gets an F.

It is a behavior we see rather often, usually in the context of the faux "debate" over anthropogenic global warming, and we ought start condemning it loudly until it is universally considered shameful: people who refuse to learn even the basics of a scientific theory not only feel entitled to have an opinion on it (as if that isn't bad enough!) but also to express that opinion publicly as though it is of equal merit, and to slander, implicitly or explicitly, the experts.

Ben Stein and his writing and production team didn't bother to learn what every high-school graduate should know about the modern theory of evolution, rendering an already poorly-produced film not only wrong, but bad. My review of their film Expelled is now (belatedly) posted on Epinions.com.

More insight on the Mentos eruption

The June issue of the American Journal of Physics (the AAPT's flagship publication) contains a report by Tonya Shea Coffey of Appalachian State University on an undergraduate class project concerning one of the Youtube-era Internet's favorite kids' pranks: the Mentos eruption.

Fruit Mentos and Mint Mentos were found to cause nearly equal emptyings of Coke bottles. Playground sand, among other things, was an adequate substitute. Diet Coke and Coca-Cola were nearly equally emptied by the Mint Mentos. Differences between Diet Coke and Caffeine Free Diet Coke were not clearly statistically significant.

The Diet Coke-Fruit Mentos combination, however, produced the longest jet, followed by the classic Caffeine Free Diet Coke-Mint Mentos pairing. Further investigation by Coffey and her students showed from photographic evidence that aspartame reduces the work needed to form a critical bubble compared to plain seltzer water and that less work is needed to form a bubble in Diet Coke than in plain Coca-Cola. SEM study found that Fruit Mentos and Mint Mentos are nearly equally rough. Moreover, unlike a wax coating previously applied by the "Mythbusters", Fruit Mentos' coating dissolves rapidly in soda water. The researchers speculate about Mentos having a surfactant component but take no measurements.

Fairly useless research, yes, but it gets students thinking about questions more subtle than those found in introductory textbooks, provides a means of introduction to surface science intersting to the common eighteen-year-old, and it's more practical than quite a bit of what ends up getting funded by DARPA.

HT: Chronicle of Higher Education