The quality of a news source passing a simple test of credibility by presenting an accurate account of a topic the reader is deeply familiar with.

For instance, if you are a Computer Scientist and you find yourself agreeing to a layman explanation of the halting problem while reading a NYTimes article (targeting a general audience) then the article passes the Gell-Mann test.

https://en.m.wikipedia.org/wiki/Gell-Mann_amnesia_effect