Summary: Today’s post continues our discussion about experts. Here are a few tips to help distinguish reliable and useful experts from those that dominate the news media, plus some warnings.
“For now we see through a glass, darkly.”
— 1 Corinthians 13:12
“Nature is objective, and nature is knowable, but we can only view her through a glass darkly — and many clouds upon our vision are of our own making: social and cultural biases, psychological preferences, and mental limitations (in universal modes of thought, not just individualized stupidity).”
— Stephen Jay Gould, Full House (1996)
We can only understand the world — even imperfectly — by seeing it through the eyes of experts. Journalists showcase experts, usually a selected coterie (note how the same few show up repeatedly in a newspapers’ article on each subject). Unfortunately, journalists’ criteria for choosing experts don’t well meet our needs. The catchy sound-bites they favor tend to come from the over-confident and arrogant, especially those that endorse the current narrative. Caveats, uncertainties, and long explanations — these are things seldom found in the news.
How can we find better sources to rely upon? How can we use them most effectively?
In my experience, one hallmark of a reliable expert is their recognition of uncertainty. The experts I trust recognize how quickly the world changes, its complexity, the severe limitation on the data we have about it, and the crude state of our theories. These traits distinguish headline-grabbing experts from economists like Nouriel Roubini, Brad Delong and Paul Krugman, physicists like Robert Hersch, climate scientists like Roger Pielke Sr and Judith Curry, and others.
How they grapple with uncertainty makes them more interesting to read, in contrast to the boring black and white certainties that dominate the news.
These experts have another useful characteristic distinguishing them from journalists’ favorites: they admit errors. Half of what we know is wrong, and top experts work to find which of their beliefs lie on each side of that line. From example, Brad DeLong (Prof Economics, Berkeley) runs posts about “smackdowns” of his work, which practice I copied in the Smackdowns page (top menu bar). Krugman often runs columns about his errors.