Technique: Chain of VerificationResearch & analysis

Check the claims before you trust them

Makes the model list every factual claim, question each one and mark what still needs a source.

When to use it

Before you use an AI answer, article or post in a report, offer or publication.

How to use it

Fill in the fields — or leave the brackets and complete them in the chat.
Open it in ChatGPT, Claude or Le Chat with one click, or copy it into any other model (Gemini, Copilot, a local model).
Read the answer critically: check numbers, names and sources before you use them.

Fill in the brackets — or leave them and fill them in the chatPaste the text or ai answer

Your prompt · 1 field(s) still empty

Check the following text for factual accuracy: [PASTE THE TEXT OR AI ANSWER]

1. List every factual claim as a numbered list (names, numbers, dates, laws, quotes, causes).
2. For each claim write one verification question that would prove it true or false.
3. Answer each question independently — do not look at the original text while answering.
4. Mark each claim: ✅ consistent, ⚠️ uncertain, ❌ likely wrong — with a one-line reason.
5. For every ⚠️ and ❌ say which official or primary source should be checked (e.g. the law, the company register, the original study).
6. Finally rewrite the text so it contains only what holds, with uncertain parts clearly marked.

Never invent sources or links. If you are not sure, say so.

Don’t paste personal data of others — or clean it first with Clean before AI. →

Related prompts

Evidence & confidence

Research analyst with confidence levels

Separates facts from assumptions and rates how sure the model is about every claim.

When to use: Questions where you must know how certain the answer is — markets, regulations, technologies.

Act as a senior research analyst. Question: [YOUR RESEARCH QUESTION].

Deliver a brief with:
1. Bottom line — the answer in 3 sentences.
2. Key findings — 5–8 bullets. Tag each: [FACT], [ESTIMATE] or [ASSUMPTION], plus confidence High / Medium / Low.
3. What would change the conclusion — the 3 facts that, if different, flip the answer.
4. Unknowns — what you could not determine and how I could find out.
5. Sources — where each fact comes from. If you are not sure a source exists, say so instead of inventing one.

Never present a guess as a fact.

Details →

Layered summary

Summarise a long document

One sentence, five points, the numbers and deadlines — and what is still unclear.

When to use: Contracts, reports, tenders, regulations or long email threads you don’t have time to read.

Summarise this document for [WHO WILL READ THE SUMMARY — e.g. the director, a new colleague]:
[PASTE THE DOCUMENT]

Give the summary in layers:
1. In one sentence — what is this document about and what does it want from the reader?
2. Five key points (bullets, max. 20 words each).
3. All numbers, amounts, dates and deadlines in a table (item | value | where in the document).
4. Obligations and risks for the reader.
5. What is unclear, contradictory or missing — as questions to ask.

Quote exact wording for anything legally or financially important. Do not add information that is not in the document.

Details →

Criteria-first comparison

Compare providers or products

Agree on the criteria first, then compare in a table — and see what must be verified.

When to use: Choosing software, a supplier, an insurance, a phone plan or any purchase with several options.

I need to choose between: [OPTIONS — e.g. three accounting programs]
For: [WHO AND FOR WHAT — e.g. a 12-person company, invoicing and payroll]
What matters most to me: [PRIORITIES AND BUDGET]

1. First propose 6–8 comparison criteria that fit my situation and explain each in one line.
2. Compare the options in a table (criterion × option). Where you are not certain, write "check" instead of guessing.
3. For every "check" cell tell me exactly where to verify it (price list, terms of service, a question for sales).
4. Recommend the best option for my priorities and the runner-up, with the main trade-off.
5. List 5 questions I should ask the provider before signing.

Remember that prices and features change — state that your information may be outdated.

Details →