How to Verify an Online Claim Using Primary Sources

Step one: turn a headline into a testable proposition

A headline such as 'new study proves phones damage memory' mixes a source description, causal claim, population, and outcome. Rewrite it: 'In which participants, did which measured exposure cause which result, using what study design?' If the exact proposition cannot be stated, the claim is too vague to verify confidently.

Step two: trace the attribution backward

Open the linked article and follow its references. If it cites a press release, inspect the underlying study or report. If it cites an unnamed 'expert', search for the actual statement and its date. Prefer the responsible institution's original dataset, text of a law, official technical documentation, or peer-reviewed paper as appropriate. An official source can also contain error, so original does not mean infallible.

Step three: inspect scope and definitions

Check geography, time period, sample, age group, and unit. 'Doubled' might mean growth from one case to two; 'most' might refer only to survey respondents. For a screenshot, look for missing axes, cropped disclaimers, or a date that belongs to a previous version of the story. For policy statements, distinguish a proposal from an enacted requirement.

Step four: compare independent material

Find a second source that conducted its own analysis or offers a different type of evidence. Two outlets copying one press release do not count as independent corroboration. For scientific results, reviews and replication may matter more than a second article about the same paper. For fast-changing products, primary documentation and a current changelog are often more useful than evergreen lists.

Step five: record what remains uncertain

A useful note records the exact claim, source link, publication or observation date, strongest supporting evidence, strongest contradiction, and status: supported, unsupported, mixed, or not yet established. Uncertainty is an outcome, not a failure. Resist promoting preliminary findings into universal rules.

Worked example: a free software claim

Imagine a page claims that an editor is 'free forever, for everyone'. The company’s pricing page may show a no-cost tier but also mention limits on exports, commercial use, storage, or countries. A screenshot from last year might be accurate historically but false for today's offer. Your revised statement should preserve conditions: 'a free plan exists; features and eligibility should be checked before use'.

Publication checklist

Before sharing a claim, include the source URL, a defensible paraphrase, the date relevant to the claim, and any material limitation. Never fake testing, interviews, or credentials to make a story sound authoritative.

FAQ: Is Wikipedia unusable? No. It can be a starting map of references, but the precise claim should be checked against the cited primary or specialist source.

A claim-to-evidence log

Use this original planning worksheet with your own information. Its example decisions illustrate a method; they are not results from a product test or a visit.