Evaluate sources for credibility and select strong evidence to support an argument claim.
A claim needs evidence -- facts, statistics, and expert statements that back it up. But not all evidence is equally trustworthy. A credible source is written by someone qualified to speak on the topic, published by a reliable organization, and current. A city arborist's report on street trees is more credible than a stranger's comment on social media, even if the comment sounds confident.
Before you use evidence, check it: Who wrote this, and are they qualified? Who published it -- a university, a government agency, a company selling something? When was it written? A source that fails these checks might still contain a true fact, but you cannot be sure, so a careful writer looks for a better one.
Mastery looks like: They can apply the who/published-by/how-current test to a source and explain in their own words why one source is more credible than another.
Common stumbles: Trusting a source because it sounds confident or matches what they already believe, rather than checking who wrote and published it.
See it visually
Interactive, spoken-aloud tools that show this idea in motion.