What is a primary source, and how do you find one behind a news report?

Summary: A primary source is the original record behind a news report: The court ruling, the study, the full transcript, or the data release. Every report is a secondhand account of one, and most errors enter in the retelling. Finding the original usually takes 1 minute, and it settles questions the report can't.

A news report is a description of a document. Behind nearly every headline sits a ruling, a study, a filing, a transcript, or a table of numbers, and the report is a reporter's account of what that record says. Readers who see a report as an account of a record ask a narrower question than "is this outlet right?" They ask "what does the original say?" and that question has a checkable answer.

What counts as a primary source in the news?

Historians call a record primary when someone with direct knowledge made it at the time: A letter, a diary, or a photograph. News has the same category with different members:

• Government records: Bills, court rulings, legal filings, executive orders, and agency rules.

• Data releases: Jobs reports, inflation tables, census files, and crime statistics.

• Research: The journal article itself, with its methods and its stated limits.

• Company documents: Earnings reports and regulatory filings.

• Recordings: The full video or transcript of a speech, a hearing, or an interview.

A secondary source describes, summarizes, or interprets one of those records. A news article is secondary by design. So is an encyclopedia entry, and so is this post.

The label depends on the question you're asking. A press release is a primary source for what an organization claimed and a secondary source for the facts it describes, which is why a press release deserves the same check as a news report.

Where does a report drift from its source?

Each retelling compresses. A 40-page ruling becomes 600 words, then a headline, then a post in a feed. Compression forces choices about what to keep, and writers competing for attention keep the strong claim and drop the careful one.

A 2014 study in The BMJ measured that drift. Researchers compared 462 university press releases about health research with the journal articles behind them and with the 668 news reports that followed. Against the journal articles, 40% of the releases gave more direct advice, 33% turned a correlation into a cause, and 36% stretched findings from animals to people. The news then inherited the stretch: When a release overstated a causal claim, 81% of the news reports did too, and when the release stayed accurate, 18% did. That's a gap of 63 points, opened before any reporter wrote a word.

The study took the journal articles as its baseline. The stretch entered between the paper and the reader, and each writer along the way was summarizing the summary before theirs. The same mechanics explain why wire services carry so much weight: Hundreds of outlets print one account, so one summarizer's choices reach millions of readers.

Readers extend the chain. A 2025 analysis in Nature Human Behaviour covered more than 35 million public posts with links on a large social network between 2017 and 2020, and around 75% of the forwarded links were shared by people who hadn't clicked them. The last retelling is often a headline, passed along by someone who read only the headline.

How do you find the primary source behind a report?

Most originals are public and free, and finding one is a short routine:

1. Find the attribution. Reports name their source in the opening paragraphs: "According to a filing," "a study published in," "data released Friday." A careful report links it, and the link is the whole search.

2. Search the proper nouns. With no link, search the agency or court, the document type, and the date. For research, search the journal and the lead author's surname.

3. Go to the publisher of record. Courts post opinions, legislatures post bill text, statistical agencies post release tables, and journals post abstracts for free.

4. Read the part written for outsiders. A ruling opens with a summary, a study has an abstract and a limitations section, and a data release leads with its main table. Those parts take 5 minutes to read.

5. Compare 3 things with the report. Check the number, the scope (who was counted, when, and how many), and the hedges. A paper's "associated with" that became a headline's "causes" tells you where the report stretched.

Source tracing pairs with lateral reading. Lateral reading tells you who stands behind a page, and source tracing tells you what the page stands on.

Is reading the original too much to ask?

For most news on most days, yes. Nobody reads a 90-page ruling over breakfast, and nobody should have to.

A primary source can also mislead by itself. A single study can be wrong, a filing argues one side of a case, and a raw data table carries none of the context a reporter gets by calling experts who know the field. A health reporter with 10 years on the beat reads a clinical trial better than most of us ever will, and we can't claim that opening the PDF closes that gap.

So we'd keep the habit for the reports you're about to act on: The one you're about to share, the one that changes how you vote, and the one that touches your health or your money. Many readers already reach for official records at that moment. In the Reuters Institute's 2025 survey across 48 markets, 35% of people said they'd turn to official sources to check a claim they doubted, 3 points behind the 38% who'd turn to a news outlet they trust.

A reader who never clicks still gains from the habit. Whether a report links its source at all tells you something, because a writer who links the document has invited you to check the work.

What a summary owes its source

A summary is honest when a reader can get back to the record it compressed. At informed.now, the brief's 6 news summaries link to a primary source wherever one exists, and we published how often that turns out to be possible.

A news report is a description of a document. The description is faster to read than the document, and most days it's enough. The document is still there, one link or one search away, for the day the description decides something.