Glenn Greenwald explains in his Intercept article Journalism’s New Propaganda Tool: Using “Confirmed” to Mean its Opposite.  Excerpts in italics with my bolds.

Outlets claiming to have “confirmed” Jeffrey Goldberg’s story about Trump’s troops comments are again abusing that vital term.

The same misleading tactic is now driving the supremely dumb but all-consuming news cycle centered on whether President Trump, as first reported by the Atlantic’s editor-in-chief Jeffrey Goldberg, made disparaging comments about The Troops. Goldberg claims that “four people with firsthand knowledge of the discussion that day” — whom the magazine refuses to name because they fear “angry tweets” — told him that Trump made these comments. Trump, as well as former aides who were present that day (including Sarah Huckabee Sanders and John Bolton), deny that the report is accurate.

So we have anonymous sources making claims on one side, and Trump and former aides (including Bolton, now a harsh Trump critic) insisting that the story is inaccurate. Beyond deciding whether or not to believe Goldberg’s story based on what best advances one’s political interests, how can one resolve the factual dispute? If other media outlets could confirm the original claims from Goldberg, that would obviously be a significant advancement of the story.  Other media outlets — including Associated Press and Fox News — now claim that they did exactly that: “confirmed” the Atlantic story.

But if one looks at what they actually did, at what this “confirmation” consists of, it is the opposite of what that word would mean, or should mean, in any minimally responsible sense.

AP, for instance, merely claims that “a senior Defense Department official with firsthand knowledge of events and a senior U.S. Marine Corps officer who was told about Trump’s comments confirmed some of the remarks to The Associated Press,” while Fox merely said “a former senior Trump administration official who was in France traveling with the president in November 2018 did confirm other details surrounding that trip.”

In other words, all that likely happened is that the same sources who claimed to Jeffrey Goldberg, with no evidence, that Trump said this went to other outlets and repeated the same claims — the same tactic that enabled MSNBC and CBS to claim they had “confirmed” the fundamentally false CNN story about Trump Jr. receiving advanced access to the WikiLeaks archive. Or perhaps it was different sources aligned with those original sources and sharing their agenda who repeated these claims. Given that none of the sources making these claims have the courage to identify themselves, due to their fear of mean tweets, it is impossible to know.

But whatever happened, neither AP nor Fox obtained anything resembling “confirmation.”

They just heard the same assertions that Goldberg heard, likely from the same circles if not the same people, and are now abusing the term “confirmation” to mean “unproven assertions” or “unverifiable claims” (indeed, Fox now says that “two sources who were on the trip in question with Trump refuted the main thesis of The Atlantic’s reporting”).

It should go without saying that none of this means that Trump did not utter these remarks or ones similar to them. He has made public statements in the past that are at least in the same universe as the ones reported by the Atlantic, and it is quite believable that he would have said something like this (though the absolute last person who should be trusted with anything, particularly interpreting claims from anonymous sources, is Jeffrey Goldberg, who has risen to one of the most important perches in journalism despite (or, more accurately because of) one of the most disgraceful and damaging records of spreading disinformation in service of the Pentagon and intelligence community’s agenda).

But journalism is not supposed to be grounded in whether something is “believable” or “seems like it could be true.” Its core purpose, the only thing that really makes it matter or have worth, is reporting what is true, or at least what evidence reveals. And that function is completely subverted when news outlets claim that they “confirmed” a previous report when they did nothing more than just talked to the same people who anonymously whispered the same things to them as were whispered to the original outlet.

Quite aside from this specific story about whether Trump loves The Troops, conflating the crucial journalistic concept of “confirmation” with “hearing the same idle gossip” or “unproven assertions” is a huge disservice. It is an instrument of propaganda, not reporting. And its use has repeatedly deceived rather than informed the public. Anyone who doubts that should review how it is that MSNBC and CBS both claimed to have “confirmed” a CNN report which turned out to be ludicrously and laughably false. Clearly, the term “confirmation” has lost its meaning in journalism.