Where this idea comes from
The source checklist
In 2004 Sarah Blakeslee, a librarian at California State University, Chico, wrote the CRAAP test — Currency, Relevance, Authority, Accuracy, Purpose — to help students judge library books and articles.
One thing to hold: A five-line checklist on a library handout.
Why it matters: A checklist looks at the page itself. In 2017 Sam Wineburg and Sarah McGrew at Stanford found that professional fact-checkers do something else first: they leave the page and read what other sources say about it — reading sideways, or “laterally”.