You ask an AI something, and its answer includes a figure, date or rule you want to use. It may even include a link. The answer could still be wrong, outdated or broader than the source. An AI can sound just as confident about information unsupported by any source, and it may invent a plausible-looking citation. A few minutes of checking will tell you whether the original source supports the claim. Then you can decide whether to use it, qualify it or leave it out.
Four classifications for a claim
After checking, a claim falls into one of these categories:
- Supported: the source says the same thing at the same scope.
- Partly supported: the source supports the core of the claim, but the claim is broader than the source, refers to a different time, or omits an important condition or step.
- Contradicted: the source says something different, such as giving a different figure or the opposite rule.
- Unverified: you cannot find a source or passage that settles the question.
The classification guides what you do next. You can use a supported claim. Rewrite a partly supported claim to match the source. Correct or leave out a contradicted claim. Mark an unverified claim as unresolved or leave it out.
Check a claim in five steps
- 1
Choose one claim
Choose a claim you plan to rely on: a figure, date, price, rule or name. Write it as a sentence of its own.
- 2
Find the original source
An original source is the page or publication issued by the source of the information, such as a government agency’s guidance, a service provider’s pricing page, a study or a statistical release. A link from an AI is a lead. A search-result summary or another site reporting the information is not the original source.
- 3
Find the passage relevant to the claim
Find the paragraph or line in the source that states the information. Also check who published the page and when it was updated.
- 4
Compare the wording
Compare the figure, date and scope. Words such as “everyone,” “always” and “free” can make a claim broader than what the source says.
- 5
Classify and decide
Choose a classification for the claim, then write one sentence stating what you will do with it and what remains unresolved.
If the answer is long, you can ask the AI to separate out the claims. You still need to open the source yourself.
Follow-up: separate out the claims to check
From your previous answer, pick up to three claims that include a figure, date, price or rule. Write each as its own sentence and preserve the wording of your answer, including words such as everyone, always and free. Do not assess whether the claims are true.
Example: the source supports only part of a claim
You ask whether an image-editing app costs anything. The answer says: “The app is free for all users, and its pricing page confirms this.” You open the pricing page yourself. It says the basic version is free, while the AI features require a monthly subscription.
- Claim: the app is free for all users.
- Source passage: the basic version is free; the AI features are part of a subscription.
- Classification: partly supported, because “free for everyone” is broader than what the source says.
- Decision: I will write, “The app’s basic version is free, but the AI features require a subscription.”
- Unresolved: prices can change, so I will note the date I checked.
Which claims should you check?
- The claim includes a figure, date, legal provision, study or person’s name.
- The information can change, such as a price, rule, service feature or schedule.
- Your decision affects health, money, rights, safety or another person.
- The AI provides a source you cannot find or one that does not say what the answer claims.
If the issue concerns your health, money or rights and the source does not settle it, ask an expert. Brainstorming and writing tone do not need a source.
Common pitfalls
- The link looks trustworthy, but the page says something else. Open the page and find the relevant passage; the address or title alone proves nothing.
- You are reading another site’s summary. Find the organization that originally published the information and check it there.
- You do not notice that the page is out of date. Check its publication or update date and look for the latest version if the information can change.
- The claim is broader than the source. When the answer says “everyone,” “always” or “never,” check whether the source says the same and narrow the claim to match its scope.
How to tell the check is complete
- The claim is written as one precise sentence.
- You opened the original source yourself and found the passage relevant to the claim.
- You classified the claim based on the source passage.
- You recorded what you will do with the claim and what remains unresolved.
Free practice on this website
Check a rough explanation against the original source
Practise with a prepared example. The rough explanation is: “The wind just turns the blades, and that produces electricity.” Check its claims against the source material below, which stays visible throughout.
Your answers remain only in this browser tab. They are not sent to AI Licenses’ servers or analytics.
Question 1/3
Question 1/3
Separate two claims from the explanation into their own sentences. Based on the material, classify each as supported, partly supported, contradicted or unverified, and justify each classification by pointing to the relevant passage.
Use the practice activity in your own AI service (optional)
Check one claim before you use it.
Choose a claim you plan to use. The AI can help compare it with a source and identify the source, but you must open the source yourself.
Fact check · about 5 min
Choose a situation
How the request is structured
- Task
- Compare the claim with the passage on the page
- Context
- I will provide the claim and passage
- Format
- Supported part, unsupported part and revision
I received an answer with a link to support it, but the page says something different. I will provide the claim from the answer and the passage I found on the page. Compare them and tell me what the passage supports and what it does not. If it supports part of the claim, narrow the claim to what the passage says. If it does not support the claim at all, say so; do not rewrite the claim. Do not look for another source.
Ready to try it in a real tool?
The same steps work with any assistant. Always open the source yourself in your browser.
Leave out identifying details: Choose a claim you have seen yourself, but remove names and other identifying details before sharing it in the conversation.
Skills and concepts in this guide
Concepts
Part of a course
- AI foundationsLearn to ask AI for a useful draft, keep it within the information you provide, verify an important claim, and compare responses. Then complete one task of your own from start to finish.
- Learn with AI without outsourcing your thinkingUse AI to study by trying first, retrieving information from memory and checking important claims against their sources.
Publication details and sources
- Published:
- August 13, 2026
- Sources checked:
- September 11, 2026
Sources
- Artificial Intelligence Risk Management Framework: Generative Artificial Intelligence Profile (NIST AI 600-1) (opens in a new tab)
- Reduce hallucinations (opens in a new tab)
- Terms of Use (opens in a new tab)
- AI Risk Management Framework (opens in a new tab)
- Artificial Intelligence Risk Management Framework: Generative Artificial Intelligence Profile (opens in a new tab)