Imagine being simple enough to buy this narrative wholesale.
There's one objectively correct version of understanding the world and the important idea is to camp people into binary groups of "believes correct news" or "believes fake news"
There are entire news organizations which pump nothing but "Fake News".
It's easy to run a study on their followers.
Now - it's never been possible to have a news organization which specializes in "100% not fake news", because every organization is going to have some slant or bias. For organizations which really with the best intentions try to present the absolute truth, you're never going to convince everyone you're not "fake news", on account of there not being such a thing as 100% objective reality. All observers are flawed.
There's one objectively correct version of understanding the world and the important idea is to camp people into binary groups of "believes correct news" or "believes fake news"