(Bloomberg View) — Does the current interest in "fact-checking" and action to deal with "fake news" serve the cause of better politics? You might think it would, or at least that it couldn't hurt. I'm skeptical.
The main problem is that teams such as FactCheck.org, PolitiFact and the Washington Post's Fact Checker don't always do what they say. Often they aren't checking facts; they're judging positions or opinions. Testing the opinions of politicians is valuable, of course, if it's done well. But it isn't fact-checking — and shouldn't claim the authority and objectivity that the term implies. Much of the time, this so-called fact-checking is opinion journalism in disguise.
"Barack Obama was born in Hawaii" is the sort of statement a genuine fact-checker checks — a statement that's simple and precise enough to be either true or false. If you're checking a claim capable of being "mostly true" or "half true," or some number of "Pinocchios," the claim you're checking isn't a fact.
Politicians express opinions imprecisely and with phony certitude, giving their declarations the appearance of factual claims. But if their comments can be understood in different ways — their supporters interpreting them one way, their opponents another — they are closer to being meaningless than to being either true or false. This ambiguity accounts for the fact-checkers' frequent failure to agree. Moreover, slogans such as "climate change is real" or "climate change is a hoax" can't be properly fact-checked as they stand: In either case, the only intelligent response is, "What do you mean, exactly?" (Admittedly, that wouldn't be a very promising journalistic franchise.)
Collections of actual or purported facts are of course capable of being "mostly true" or "partly true" in the aggregate. But when facts are arranged to support an opinion, more than aggregation is involved. They're being plugged into something that's different in kind.
To decide whether an opinion is well supported requires not only that you check the stated facts (if any), but that you also consider context, assess underlying assumptions, and inspect the logical structure. Missing information, subjective weightings of causal factors, judgments about probabilities and many other confounding influences enter in. Disagreements that mere checking of facts can't resolve are bound to arise — even before you bring in values, which views about politics generally do.
Hence the expression, difference of opinion.
Values and biases
Predictions — opinions about the future — are especially problematic. Debating his proposed health care reform in October 2008, Barack Obama said that "if you've got a health care plan you like, you can keep it." At the time, as the Wall Street Journal's James Taranto has pointed out, PolitiFact rated this "True." In 2009 and 2012, it rated the same statement "Half True." In 2013, PolitiFact's "Lie of the Year" was "If you like your health care plan, you can keep it."