Judging these things can be pretty complicated - sometimes a journalist could be telling the truth, sometimes not, and either way your decision is based on how much you trust them. How to asses that though?
What's uncomfortable for people is that most of the time we should just be saying "I don't really know if this news is true or not", and then apply something like ockham's razor as well as looking for flaws in the logic of the story.
At the end of the Day, you need to use your own Brains and Judge the fact.
Either its true or not.