"The point of modern propaganda isn't only to misinform or push an agenda. It is to exhaust your critical thinking, to annihilate truth." -Garry Kasparov.
And
"This constant lying is not aimed at making the people believe a lie, but at ensuring that no one believes anything anymore." This latter quote is, rather ironically, a false quote! (falsely attributed to Hannah Arendt). But I still think it contains truth.
Selective truth is far more effective, and more common, propaganda. Not in omitting important context from a story, but by omitting or burying (or simply never seeking out) entirely stories you don't want heard, and emphasizing stories you do want heard. In essence, holding up a funhouse mirror to society.
This is the propaganda you get when all your reporters think they are being honest and uncensored, but they all deeply care about the same set of issues, and are deeply ambivalent about another set.