Prompt guide
How to make ChatGPT double-check an answer
‘Are you sure?’ often produces reassurance. A good re-check prompt gives the model a concrete audit job.
Use this stronger double-check prompt
Why ‘are you sure?’ is weak
A vague challenge does not specify what to inspect. The model may repeat the same reasoning with more confidence, apologize without finding the defect, or change the wording while preserving the underlying error.
An audit prompt creates artifacts you can review: claim list, assumptions, evidence requirements, and changes. That makes unsupported certainty easier to spot.
Four useful second-pass modes
Claim audit
Best for factual prose. Extract claims, confidence, source status, and possible contradictions.
Assumption audit
Best when the question is underspecified. Identify every interpretation and ask the missing questions.
Counterargument pass
Best for recommendations and strategy. Present the strongest opposing evidence and conditions that reverse the conclusion.
Reproduction pass
Best for code, math, and data. Re-run steps, show intermediate values, and test edge cases independently.
Make the prompt fit the task
| Task | Add this instruction |
|---|---|
| Current information | Use current web sources, show publication and event dates, and flag any claim that could have changed. |
| Document analysis | Quote the exact passage and page or section for every material claim; label anything not present in the document. |
| Calculation | Show formulas, units, intermediate values, and an independent check using a second method. |
| Recommendation | State selection criteria, excluded options, trade-offs, and the facts that would change the recommendation. |
| High-stakes question | Explain limits, cite authoritative current sources, and identify where qualified professional review is required. |
Sources and further reading
Product details and guidance were checked against these first-party pages on July 29, 2026. Re-check current listings before making an install or high-stakes decision.
- Does ChatGPT tell the truth?
OpenAI Help Center
OpenAI's guidance on incorrect answers, fabricated citations, confidence, search tools, and verification.
FAQ
Questions people ask
Will ChatGPT admit when it is wrong?
It sometimes will, especially when given contradictory evidence or a concrete audit task. It can also accept a false correction or produce another unsupported revision, so inspect the evidence.
Does asking twice improve accuracy?
A structured second pass can reveal defects and improve the response. Repetition alone is weak because the same model can repeat the same error.
Should I start a new chat to double-check?
A new chat can reduce anchoring on the first answer, but it is still not independent evidence. Give the second chat the exact claim and ask for sources and falsification conditions.