An online claim often travels through several articles before it reaches you. Each retelling can simplify the wording, remove a qualification or attach a conclusion the original evidence did not support. Tracing the source means following the chain far enough to understand what was actually observed, announced or documented. Begin with one important statement rather than trying to investigate an entire article at once.
Capture the claim exactly
Write down the relevant sentence, the page address and the date of the article. Preserve numbers with their units and time periods. A claim about annual spending differs from a monthly average; a change in survey respondents differs from a change in the whole population. Small details determine which source you need.
Mark words that imply certainty or causation. Proves, always and leads to are stronger than suggests, often and is associated with. You are not deciding immediately that the stronger wording is wrong. You are identifying what the underlying evidence would have to show for the statement to be justified.
Follow the nearest useful reference
Open the link attached to the statement. If it points to another news article, continue to that article's references. Keep a short chain of addresses so you can distinguish original evidence from commentary. A reputable summary can help you understand a document, but it remains a summary of someone else's work.
If the reference is missing, search a distinctive phrase together with the named organisation, author or report. For a company announcement, look for its newsroom. For a public decision, look for the responsible authority's published notice. Do not assume the oldest search result is the original simply because it carries the earliest visible date.
Identify the document you have found
Determine whether the source is a dataset, a research paper, an opinion piece, a press release or a marketing page. Each can answer different questions. A press release is primary evidence that an organisation announced something; it is not independent confirmation that every claim in the announcement is accurate or complete.
Read the title, date, author and relevant section before extracting a quotation. Check whether a later version or correction exists. If the document includes a method section, inspect the parts that define the sample, period and measurements. You do not need to master every technical detail to notice that the article describes a different population.
Compare scope and wording
Place the claim and the source passage side by side. Are the location, time, people and outcome the same? A local pilot may become a nationwide trend in a headline. An estimate may become a measured total. Write the narrower statement the source actually supports, including the conditions that matter to the reader.
Look for what the source cannot answer. A survey of preferences may not explain actual behaviour; a list of registrations may not measure active users. This does not make the material useless. It helps you use it for the appropriate purpose and avoid repeating an interpretation that runs beyond the available evidence.
Record an evidence trail that another reader can follow
Keep the original document link, the section or page number and a short explanation of how it supports your statement. If you quote words, mark them clearly as a quotation. If you paraphrase, preserve the original meaning and limitations. Your note should make it possible to retrace the reasoning without repeating the entire search.
When the source cannot be recovered, say so in your working notes and avoid treating the claim as established. You may still describe it as an unverified report if that distinction is relevant, but a practical guide can often omit the fragile claim entirely. A smaller, well-supported point is more useful than a dramatic statement with no recoverable foundation.
Further reading: MIT Libraries: evaluate information
