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Here is a brief excerpt from an article by Steven Pinker for the Wall Street Journal. He explains how and why the “curse of knowledge’ leads writers to assume their readers know everything they know. Worse yet, poor wording drains vast sums of money from the economy. To read the complete article, check out others, and obtain subscription information, please click here.

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Why is so much writing so bad? Why is it so hard to understand a government form, or an academic article or the instructions for setting up a wireless home network?

The most popular explanation is that opaque prose is a deliberate choice. Bureaucrats insist on gibberish to cover their anatomy. Plaid-clad tech writers get their revenge on the jocks who kicked sand in their faces and the girls who turned them down for dates. Pseudo-intellectuals spout obscure verbiage to hide the fact that they have nothing to say, hoping to bamboozle their audiences with highfalutin gobbledygook.

But the bamboozlement theory makes it too easy to demonize other people while letting ourselves off the hook. In explaining any human shortcoming, the first tool I reach for is Hanlon’s Razor: Never attribute to malice that which is adequately explained by stupidity. The kind of stupidity I have in mind has nothing to do with ignorance or low IQ; in fact, it’s often the brightest and best informed who suffer the most from it.

I once attended a lecture on biology addressed to a large general audience at a conference on technology, entertainment and design. The lecture was also being filmed for distribution over the Internet to millions of other laypeople. The speaker was an eminent biologist who had been invited to explain his recent breakthrough in the structure of DNA. He launched into a jargon-packed technical presentation that was geared to his fellow molecular biologists, and it was immediately apparent to everyone in the room that none of them understood a word and he was wasting their time. Apparent to everyone, that is, except the eminent biologist. When the host interrupted and asked him to explain the work more clearly, he seemed genuinely surprised and not a little annoyed. This is the kind of stupidity I am talking about.

Call it the Curse of Knowledge: a difficulty in imagining what it is like for someone else not to know something that you know. The term was invented by economists to help explain why people are not as shrewd in bargaining as they could be when they possess information that their opposite number does not. Psychologists sometimes call it mindblindness. In the textbook experiment, a child comes into the lab, opens an M&M box and is surprised to find pencils in it. Not only does the child think that another child entering the lab will somehow know it contains pencils, but the child will say that he himself knew it contained pencils all along!

The curse of knowledge is the single best explanation of why good people write bad prose. It simply doesn’t occur to the writer that her readers don’t know what she knows—that they haven’t mastered the argot of her guild, can’t divine the missing steps that seem too obvious to mention, have no way to visualize a scene that to her is as clear as day. And so the writer doesn’t bother to explain the jargon, or spell out the logic, or supply the necessary detail.

Anyone who wants to lift the curse of knowledge must first appreciate what a devilish curse it is. Like a drunk who is too impaired to realize that he is too impaired to drive, we do not notice the curse because the curse prevents us from noticing it. Thirty students send me attachments named “psych assignment.doc.” I go to a website for a trusted-traveler program and have to decide whether to click on GOES, Nexus, GlobalEntry, Sentri, Flux or FAST—bureaucratic terms that mean nothing to me. My apartment is cluttered with gadgets that I can never remember how to use because of inscrutable buttons which may have to be held down for one, two or four seconds, sometimes two at a time, and which often do different things depending on invisible “modes” toggled by still other buttons. I’m sure it was perfectly clear to the engineers who designed it.

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Here is a direct link to the complete article.

Steven Pinker is Johnstone Professor of Psychology at Harvard University and the chairman of the Usage Panel of the American Heritage Dictionary. This article is adapted from his book The Sense of Style: The Thinking Person’s Guide to Writing in the 21st Century, published by Viking Adult (September 2014). To learn more about him, please click here.