Kevin Drum Accused of Obeying the Law

On Friday night I snarked that the NAEP folks—who produce the “gold standard” of student testing—couldn’t even count to two:

Muphry’s Law states that “If you write anything criticizing editing or proofreading, there will be a fault of some kind in what you have written.” Sure enough, a regular reader emails to say that I got this wrong. Here are the exact numbers:

  • 2015 score: 265.4, which rounds to 265.
  • 2017 score: 266.6, which rounds to 267.
  • Difference: 1.2, which rounds to 1.

This is actually a really nice example of how rounding numbers can get you into trouble. And it means that I have to change my criticism from NAEP’s too-weak arithmetic skills to its too-strong adherence to house style. Obviously their house style for simple graphics like this is to use only whole numbers. That’s probably a good style rule. But accuracy and clarity are always your main goal, and there are rare occasions when you just have to make style exceptions. Here’s what the chart should have looked like:

Maybe there’s another way to do this, but one way or the other, the graphic simply can’t be allowed to display what looks like an obvious error. In long rows of numbers, you sometimes see the disclaimer “does not add to 100 due to rounding,” or something similar. Maybe something like that would be enough. But I suspect that the cleanest and clearest way of getting this right is to break the style rule. I sympathize with style nazis, since I tend to be one myself, but every once in a while house style rules just have to be broken.

Dear Reader,

This feels like the most important fundraising drive since I've been CEO of Mother Jones, with staggeringly high stakes and so much uncertainty. In "News Is Just Like Waste Management," I try to unpack the reality we all face and how we can rise to the challenge. If you're able to, this is a critical moment to support Mother Jones’ nonprofit journalism: We need to raise $400,000 to help cover the vital reporting projects we have planned, and right now is no time to pull back.

Monika Bauerlein, CEO, Mother Jones

Dear Reader,

This feels like the most important fundraising drive since I've been CEO of Mother Jones, with staggeringly high stakes and so much uncertainty. In "News Is Just Like Waste Management," I try to unpack the reality we all face and how we can rise to the challenge. If you're able to, this is a critical moment to support Mother Jones’ nonprofit journalism: We need to raise $400,000 to help cover the vital reporting projects we have planned, and right now is no time to pull back.

Monika Bauerlein, CEO, Mother Jones

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate