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Verification guide · 9 min

Fact-check an AI answer before reusing it

A persuasive answer can combine accurate facts, irrelevant sources and overconfident conclusions. Verification starts by isolating important claims and tracing them to original documents.

Updated 26 September 2026Read and editorially checked by Pictoquest
A researcher checks a digital answer against documents and highlights supporting evidence.
Key points

The minimum check

Identify claims that would change your decision. For each, open a primary source, check that it supports the precise statement, review its date and scope, then state the limits of what is established.

  • Isolate decisive claims
  • Read original sources
  • State the limits

A repeatable verification workflow

  1. 1. Break up the answer

    List definitions, figures, citations, links, recommendations and inferences separately. Prioritise items that affect a decision, expense or publication.

  2. 2. Identify the expected source

    Find the law, vendor documentation, dataset, original study or official statement relevant to each claim. A page summarising a study is not always enough.

  3. 3. Open the document

    Check that the link works and the cited passage exists. Read its context, notes, population, method and author caveats.

  4. 4. Check time

    Record the event date, publication date and last update. For prices, features, office-holders or rules, compare the answer with a current source.

  5. 5. Recalculate where needed

    Recompute percentages and conversions from source values. Preserve units, comparison bases and periods; an exact decimal does not fix a wrong denominator.

  6. 6. Write cautiously

    Separate established facts, interpretations and hypotheses. Remove irretrievable citations and explicitly flag points that cannot be confirmed.

Put the method to work

Practical case

Take a five-sentence AI answer about a dated fact and split it into checkable claims.

Evidence to keep

For each claim, record primary source, passage, date, recalculated figure where needed and uncertainty.

Make the decision

Remove or qualify claims without evidence; do not treat a nearby link as verification.

Four reliability signals

Traceability

Does each important claim lead to an accessible source?

Match

Does the source say precisely what the answer claims?

Recency

Does the document cover the relevant period?

Scope

Do the figures and conclusions apply to the right population and place?

6 starting points

Tools for finding original sources

Compare cited search, scholarly research and conventional web search in the directory. References make checking easier, but never replace reading the documents.

How is this selection produced?

Active services are distributed across guide-related categories, then ordered by editorial highlighting and internal score. This does not assess security, compliance or performance on your use case. Methodology.

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Frequently asked questions

Does a linked citation guarantee a true answer?

No. A real link may fail to support the sentence, point to a secondary source or cover a different period.

Which claims should be checked first?

Those involving health, law, money, safety, figures or an irreversible decision.

What if the original source is unavailable?

Find another primary source. Otherwise attribute the information to a secondary source and lower the stated certainty.

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