Claude can be wrong and sound completely sure, which is the annoying part. These are the 4 prompts I paste in after every important answer. Each one catches a different kind of error. Run all four and very little slips through.
When To Use It
Run it when being wrong is expensive. Think of a decision you can’t easily undo, something you’re sending to your boss or a client, or anything legal, medical, financial or hiring-related. Skip it for brainstorming or anything where a mistake just means a redo.
How To Run It
After Claude’s first answer, paste the prompts one at a time, in order, in the same chat. Each one builds on what the last one surfaced. Keep web search on so Prompt 4 can point you to real sources. By the end you either trust the answer for good reasons or have a short list of what to check.
Catches overconfidence. Claude sounds sure by default. This makes it rate its own answer, tag each claim high, medium or low, and say what would raise the score. Treat the score as a signal, not proof. A drop in confidence tells you where to dig.
Catches hidden assumptions. The first answer assumes a normal version of your situation. This one makes Claude list what it assumed, find the edge cases where its answer breaks and argue the opposite side.
Catches beginner mistakes. The first answer is usually the smart-generalist version. This puts Claude in the shoes of someone with 20 years in the field and has it rewrite the answer the way they would, plus the one question that expert would ask you first.
Catches blind trust. This one makes Claude tell you exactly what to check, where and how long it takes, including when to stop and call a real lawyer, doctor or accountant. Click every link it gives you. If a source doesn’t open or doesn’t say what Claude claimed, that’s your answer.
01
The confidence check shows you where to push
You learn which parts of the answer are shaky and which are firm.
02
The failure hunt finds the cracks
Now Claude hunts problems in exactly the shaky areas. The assumption list usually surfaces the real issue.
03
The expert review goes deeper
With the weak spots already in the chat, the expert rewrite is far sharper than if you asked for it cold.
04
The verification path closes the loop
Claude already knows where it’s unsure, so its list of what to check is specific.
Only Have Time For One?
Run Prompt 3, The Expert Review. It catches the most on its own. The full stack is what gets you from "Claude told me X" to "I checked X, and here’s why it holds up."