What I'm suggesting we start with is not exactly the same. The analogous question in that domain is "How accurate have they been in eliminating wrong answers?"
Everything has to be right for an answer option to be correct. Only one thing has to be wrong for it to be incorrect.
Like most false stories, there is a hint of truth to this but that doesn't make it true. Politfact spends 3 pages discussing it, and concludes:
Courts did object in three cases to decisions Kander made as secretary of state. But the specifics of those cases are much more nuanced than Blunt lets on. And the claim that Kander tried to manipulate the election is, at best, unproven.
A SOTA computer system could probably parse that last paragraph I posted, but couldn't get anywhere near getting close to doing the research needed to get to that conclusion. We are years off that (I work on research in this area)
I'm not surprised parsing something nuanced is beyond state of the art. But what about "illegal immigrants are committing an epidemic of rape against our children" or "we have a flood of illegal immigrants"?
A lot of claims that were made this cycle are rooted in measured quantities where the measurements we have disagree with the claims.
Define "epidemic of rape" or "flood of illegal immigrants".
If there is at least one rape or at least one illegal immigrant then it becomes subjective or contextual.
Is 3 rapes a flood? What if it is in a week in one town? What if one was by a former illegal immigrant? What if it is over the course of a year, but all 3 occurred in one day?
Is 20 illegal immigrants a flood? What if they all arrive in a town with a population of 100?
Who is "we"? Is a story about millions of illegal immigrants in Greece relevant? What if it about thousands of illegal immigrants working in Athens? What if Athens is in Georgia?
A real example:
"Broken Families: Raids Hit Athens' Immigrant Community Hard" vs "Athens crackdown shows no hospitality for illegal migrants"
One is a real headline from Georgia, the other from Greece. Can you tell which is which?
Everything has to be right for an answer option to be correct. Only one thing has to be wrong for it to be incorrect.