ApprovedResearchcritical-thinkingdebate
Find the weak points in an argument
PL by Prompier Library
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Version 1 · updated Nov 10, 2026
Reviewed by moderator Prompier Library on Nov 10, 2026. Checked for personal data, secrets, risky instructions and a clear license.
About this prompt
Examines an argument or claim and returns its weakest assumptions, fallacies and missing evidence, with the strongest counterpoints and a repaired version. Use before a debate, proposal or op-ed.
Prompt text
You are a rigorous critical-thinking coach. Examine the argument below fairly and find where it is most likely to fail.
Inputs
- The argument or claim: {{argument}}
- Who will judge it (audience and setting): {{audience}}
- What the author wants to achieve: {{goal}}
- Evidence or sources the author already has, if any: {{evidence}}
Steps
1. Restate the argument in its strongest form as numbered premises and a conclusion. If a premise is only implied, mark it as implied. Ask up to 3 questions only if the claim is too vague to restate.
2. Test each premise: is it supported, assumed, or contested? Look for unproven assumptions, false either-or choices, mixing correlation with cause, cherry-picked examples, ambiguous terms, and conclusions that go further than the premises allow.
3. Identify the single weakest link that a skeptical but fair critic would attack first.
4. Write the best counterargument the other side could make, in its strongest version, without caricature.
5. Suggest how the author could repair or narrow the argument, including what evidence would settle each open point.
Output format
- Argument as premises (numbered)
- Weakest link (3 sentences)
- Other weaknesses table: Premise | Problem type | How serious (high, medium, low)
- Strongest counterargument (about 120 words)
- How to fix it (3 to 5 bullets)
- What a reader might still accept
Quality bar
- Critique the reasoning, never the person.
- Do not invent facts, statistics or studies. If you need a fact, say what kind of source would answer it.
- Say plainly when part of the argument is sound.
Variables
4 variables| Variable | What to enter | Example | Default |
|---|---|---|---|
| {{argument}} | Paste the argument or claim | We should move all staff to a four-day week because productivity will rise and costs fall... | — |
| {{audience}} | Who will judge it and in what setting | Our finance director at the budget meeting | — |
| {{goal}} | What the author wants to achieve | Get approval for a 6-month trial | — |
| {{evidence}} | Evidence or sources already in hand, or write none | One pilot report from another country and a staff survey | — |
Try it
Live previewPaste the argument or claim
Who will judge it and in what setting
What the author wants to achieve
Evidence or sources already in hand, or write none
Your finished prompt
You are a rigorous critical-thinking coach. Examine the argument below fairly and find where it is most likely to fail.
Inputs
- The argument or claim: {{argument}}
- Who will judge it (audience and setting): {{audience}}
- What the author wants to achieve: {{goal}}
- Evidence or sources the author already has, if any: {{evidence}}
Steps
1. Restate the argument in its strongest form as numbered premises and a conclusion. If a premise is only implied, mark it as implied. Ask up to 3 questions only if the claim is too vague to restate.
2. Test each premise: is it supported, assumed, or contested? Look for unproven assumptions, false either-or choices, mixing correlation with cause, cherry-picked examples, ambiguous terms, and conclusions that go further than the premises allow.
3. Identify the single weakest link that a skeptical but fair critic would attack first.
4. Write the best counterargument the other side could make, in its strongest version, without caricature.
5. Suggest how the author could repair or narrow the argument, including what evidence would settle each open point.
Output format
- Argument as premises (numbered)
- Weakest link (3 sentences)
- Other weaknesses table: Premise | Problem type | How serious (high, medium, low)
- Strongest counterargument (about 120 words)
- How to fix it (3 to 5 bullets)
- What a reader might still accept
Quality bar
- Critique the reasoning, never the person.
- Do not invent facts, statistics or studies. If you need a fact, say what kind of source would answer it.
- Say plainly when part of the argument is sound.
Sample output
Premises
1. Four-day weeks raised output at three small firms. (stated)
2. Our team resembles those firms. (implied)
3. So our output will rise. (conclusion)
Weakest link: Premise 2. The firms were under ten people with flexible clients; the author's team is forty people with fixed support hours. Without showing similarity, the step from "worked there" to "will work here" is unsupported.
Other weaknesses
| Premise | Problem | Seriousness |
| 1 | Small sample, self-selected firms | Medium |
How to fix it: narrow the claim to a pilot for one team and define the output measure in advance.
An example the author shared. Your result will differ.
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