“agreed in principle”
On Saturday, The New York Times reported that the United States and Iran agreed to hold one-on-one negotiations on Iran’s nuclear program.

Note the first sentence.
The White House quickly denied that any talks had been set. Thus, The New York Times then reported that the United States and Iran have agreed in principle to hold one-on-one negotiations on Iran’s nuclear program.

It’s the principle of it.
Not a bad content strategy, milking two articles out of one story.