Arkansas Democrat-Gazette

’ Rithmetic rage

- BRENDA LOOPER

Politics and math just don’t mix, at least judging from the rounding errors and statistica­l shenanigan­s blighting the landscape. If that landscape was at least a Claude Monet or Thomas Moran, I could enjoy it a lot more.

One of the latest numbers to irritate my sensitive psyche ( as I’m sure some think I must have … darn my truth sensitivit­y): $ 19 trillion. Political candidates and pundits trumpet it repeatedly, and so do their followers— the U. S. has a $ 19 trillion national debt. Except we don’t. According to us government­debt. us and Fiscal Fact Check, the real number is about $ 18.15 trillion. OK, the actual number was $ 18,149,537,205,000, but in newspapers, we don’t write out the whole number in most instances ( too many opportunit­ies for error, for one thing); we round it.

Of course, there are always those who’ll round up or down when it’s most politicall­y expedient. We, though, rely on the tried and true rule of rounding up if the number is 5 or higher, and down if it’s lower. That means that if you say the debt is $ 19 trillion, you’re overreachi­ng by about $ 850 billion. If you say it’s $ 18 trillion, you’re more correct, but underplayi­ng it by $ 150 billion— not insignific­ant, but less than a fifth of the overreach.

For those who say that’s clear evidence of bias to point that out, and especially to note the nearly $ 1 trillion difference in the real number and the overestima­tion, sorry. That’s just math, which in its purest form reflects reality. No matter how hard you try, 2+ 2 will just not equal 19 trillion.

As with words then, math ( often incorrect) is used as a political truncheon.

Is there a reason for all this? Possibly, according to a study by Yale law professor Dan Kahan. He gave 1,000 participan­ts a complex math problem— determinin­g the effectiven­ess, using raw data, of a skin cream that sometimes heals rashes and sometimes doesn’t— so difficult that 59 percent got it wrong.

That same question was then reframed to be about concealed- carry laws; this time the participan­ts’ preconceiv­ed notions on gun control affected their ability to answer the question correctly. Kahan had two theories on why that happened: the participan­ts intuited an incorrect answer that meshed with their political beliefs and simply stopped checking further; or they calculated the correct answer, but it didn’t agree with their politics so they refused to accept it, dreaming up complex reasons for why it wasn’t correct.

Ideology over evidence? The hell you say!

Frequent correspond­ent Don Kline brought up the games people play with statistics to further political agendas, noting two recent Perspectiv­e pieces that ran on the same day, both citing the familiar 20 percent of college women raped. One of the essays noted that the Justice Department’s legal definition of rape results in rates of 3 and 4 percent of college women. By adding attempted rape and what is now considered sexual assault ( forced kissing, fondling, etc.), the number rises to 20 percent.

Don asked: “If someone didn’t read both editorials, how are they to know that the figure that they did read might be incorrect ( inflated??). If they did read both articles, how do they know which one to believe? Although, the first article, with its explanatio­ns of the ‘ legalese,’ seems to be much clearer.”

He’s absolutely right, and we should always take statistics with a grain of salt … or a whole cargo- ship load if from a clearly partisan source. Often those numbers are sliced and diced in such a way to make one side look positively angelic and the other side one step removed from Satan himself. That’s one reason I always check the methodolog­y of studies and polls, as well as their definition­s of terms and categories, to gauge how much trust I should place in their numbers.

Like any other study, the source is important in determinin­g reliabilit­y, as are peer reviews, the margin of error, makeup of the participan­ts and how they were chosen, whether the study design is appropriat­e for the subject, if the raw data are included and properly calculated, etc. Studies that don’t adhere to generally accepted principles of research and that don’t show their work ( math- class flashback!) are not to be trusted.

Well, unless they say what you want them to say. ’ Cause, ya know, ideology is far more important than getting things right.

Aaaand here come the “dang liberal” epithets again.

When I started at the paper back in 1997, Charlie Allbright was one of the first people to make me feel comfortabl­e, offering me jokes, stories and advice. He always made me smile, and was just as down- to- earth and genuine as his columns indicated.

When Charlie left the office to work at home, I didn’t see him as often, but it was always a highlight of my day when he’d come in for his check or just to visit. Then, after his and Richard Allin’s columns were discontinu­ed, his visits were rare, but still always appreciate­d. He, like many of the old guard, never lost that ability to make me laugh, sometimes to the point of crying.

Now he’s joined other vets of the newspaper war we’ve lost, like Jerry Jones and Leroy Donald. I’m pretty sure there’s a lot of laughter going on right now wherever they are.

Assistant Editor Brenda Looper is editor of the Voices page. Read her blog at blooper022­3. wordpress. com.

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