I'm sure I came across a "syndrome" to describe this. Say you're an expert in physics, and read an newspaper article where the reporter has completely misunderstood the Large Hadron Collider. You laugh and say "this person has no clue what they are talking about!"
You turn the page, and read an article about something you know less about, say, economic theory. "Hmmm, interesting!" you think, immediately forgetting that the reporter may have got this wrong too.
Best Answer
I finally found what I was looking for:
The Gell-Mann Amnesia effect, a name coined by Michael Crichton: