Krugman often reviews his past predictions and admits when he is wrong:
http://www.truth-out.org/opinion/item/31524-ten-years-later-...
We can learn this from the Chomsky/Zinn's media manipulation model.....
....or simply from Criswell's monologue to Ed Wood.
If you were to corner most newspaper editors, they would simply say "it's up to readers to do research and make up their minds" or "we provide a service by stimulating conversation and making you think." These are both true, but don't undo the damage caused by sending us careening around in fear and uncertainty by whipping us into perpetual emotional dissonance.