Emphasis on "fake news" and fact checking is so misguided.

The core problem is unsourced, unattributed information. The difference between gossip and journalism.

What is the provenance of every statement?

The Correct Answer is adding signatures to every thing, so we can independently verify that someone said something.

Once we have traceability, people can figure out what is more true (less wrong), over time. Just like with academic publishing.