AI can confidently provide false information because a fluent, persuasive answer is not, by itself, a guarantee of accuracy. Fact-checking helps separate confirmed information from plausible errors: verify important claims against reliable sources instead of treating the answer’s tone as proof.
Be especially cautious with exact dates, figures, quotes and names—these details are easy to check and can be costly to trust without verification. Here’s how to spot confident AI errors and check facts without turning every conversation with a neural network into an investigation.
| Claim type | What to verify | Warning sign |
|---|---|---|
| Date | The event date and publication date | Words like “now” or “latest” without a date |
| Price | Currency, market, date and configuration | A price with no purchase terms |
| Figure | Unit, period and definition of the metric | A number without context |
| Quote | The exact wording in the original text | Attribution cannot be confirmed |
| Source title | Whether the document exists and contains the relevant passage | The source is mentioned only in the model’s answer |
- 2 models Specific examples of language assistants in this article: ChatGPT and Gemini.
- 4 fields A practical fact-checking framework: author, document, date and exact wording.
- 3 types Answer details to check separately: dates, figures and quotes.
Why might a language model confidently state something false?
OpenAI’s ChatGPT and Google’s Gemini can confidently state something false because they generate text in response to a prompt rather than verifying every claim against a primary source. Smooth wording does not prove accuracy: even a plausible-sounding answer about a specific device needs to be checked against documents about it.
When answering a question about a gadget, a model may mix up three different dates: the device’s release, an update to the page describing it, and the publication of a news story. For example, the date a page was updated does not thereby become the model’s release date. Check each date separately against the document itself and the relevant passage, rather than trusting the confident tone.
How to check a source
A company or report name may sound convincing, but that alone does not confirm that the document exists. Asking ChatGPT or Gemini to name a source does not turn its answer into a verified bibliography, either: find the document independently and check its author, title, publication date and the specific passage supporting the claim. If you cannot find the document or it does not contain the relevant passage, treat the source as unconfirmed.
How can you check a date and avoid mistaking old information for new?
Event date and publication date
Check the date of the event itself, the publication date and the product’s current status: a story about a smartphone announcement confirms that it was unveiled, but does not prove that it is currently on sale. To assess whether an answer is up to date, compare the named model with the manufacturer’s page: the same name does not guarantee that it refers to the latest version.
- Event: Find out whether the text describes a model’s announcement or its availability for purchase.
- Publication: Note when the article was published; do not mistake that for the event date.
- Model: Check the exact name against the manufacturer’s page and verify which version it refers to.
Price and time-related wording
When checking a price, record the amount along with the currency, market and date of verification: the “₽” symbol alone does not tell you where or when the product was sold. Compare the price with the listing on the specified sales page, and do not carry a price from an old article over to today’s market.
Words like “now,” “this year” and “latest” need a calendar date; without one, it is impossible to know when the claim applies. For example, instead of saying “the latest version,” specify the date you checked and compare the model with the manufacturer’s current information.
How can you check a source, figure and quote?
Check an AI answer against the primary document: find the source it names, verify the author and date, then check the exact wording and what the figure actually measures. Without these steps, a percentage, a price in ₽ or a period in days may look convincing without supporting the conclusion you need.
Four fields to check: author, document, date and exact wording.
- Author: Make sure the quote really belongs to the named person or organization. If the phrase appears only in the AI’s answer, do not attribute it to anyone.
- Document: Open the primary source and find the exact figure along with its unit of measurement. Percentages, rubles and days cannot be compared without context: for example, the price of one device and the average price in a category are different metrics.
- Date: Check the period covered by the figure and whether the document is relevant to your question. A product price, a subscription price and the average price in a category are not interchangeable.
- Exact wording: Compare the quote word for word with the primary text. For a law or standard, check the full title and the specific edition: a general summary is no substitute for the rule currently in force.
If you cannot find the primary source or it does not contain the relevant figure, treat the claim as unconfirmed, not proven. Do not transfer a value from one context to another: check the unit of measurement, what is being compared and the document edition before repeating the conclusion.
What kind of check is right for different types of claims?
The type of claim determines how to check it: compare news with the original publication and its date, specifications with the manufacturer’s documentation, prices with the terms of purchase, and quotes with the original text and its context.
- News. Find the original publication and check when it appeared: a retelling may omit the date or change the meaning of the event.
- Gadget specifications. Open the manufacturer’s page and compare the exact model name with the specifications in the answer. For example, two versions of the same smartphone may differ in memory or supported features.
- Price. Compare the same configuration, currency and purchase terms. The price of a smartphone with more storage and the price of the base version are not comparable; the same applies to home appliances sold in different configurations.
- Quote. Look for the original text and read the surrounding sentences: taken out of context, a phrase may sound like an assertion even though the author qualified or denied it.
This kind of check helps distinguish a factual error from a difference in device versions, configurations or terms. If the primary source is unavailable, note that the claim could not be confirmed rather than treating a retelling as proof.
When will this fact-checking framework not work?
Uncertainty is also a fact-checking result
This framework will not work if the source you find does not support the specific conclusion being drawn from it: a manufacturer’s page may confirm a device’s specifications, but not an independent assessment of its quality or its current price in a store. For example, a model description on a company website is no substitute for checking the price with a retailer.
Searching for an exact phrase does not give a definitive answer, either: the quote may appear in an inaccessible source or in a translation where the wording has changed. So a missing match does not prove that nobody said it. Before reaching a conclusion, it is important to distinguish exactly what the source you found confirms:
- A manufacturer’s page confirms the stated specifications of a specific model, but not its independent quality or its price in a store.
- An exact-quote search finds matches in accessible texts, but cannot prove that the statement was never made.
- A figure without a period, sample and definition of the metric is not enough to compare it with another figure—even if the units of measurement are the same.
ChatGPT and Gemini can phrase an answer confidently, but tone does not confirm its reliability. If you cannot open and check the primary source, leave the claim unconfirmed—do not turn a lack of evidence into proof that it is false or true.
What should you do before using an AI answer?
Before using an answer from ChatGPT or Gemini, break it down into individual claims, check each one against an independent source and record the source’s publication date. For example, the device’s release date, its price in ₽, the model name, a verbatim quote and a claim about the cause of an event must all be checked separately: confirming one does not prove the others.
Checking and presenting information
For each claim, record exactly where you found confirmation and when the material was published. If you cannot find the source, do not present the statement as established fact: label it unconfirmed or leave it out. ChatGPT and Gemini are not primary sources, so you cannot cite their answers as evidence.
Before making a comparison, convert the units if needed and make sure you are comparing the same parameters—for example, the price of the same device model in the same configuration, not different versions. In the final text, clearly distinguish confirmed information from assumptions: readers should be able to tell which parts are supported by a source you found and which remain an interpretation.
Frequently asked questions
Why does AI make mistakes in a confident tone?
What should you check first—the date or the source?
Can you use a quote generated by a chatbot?
What should you do if you cannot find the source?
