Paste your goal and constraints
The checker scans both for opposing-term patterns like "always"/"never" or "formal"/"casual" appearing together.
PROMPT CONSISTENCY HEURISTIC
Prompt Contradiction Checker
Run a simple keyword heuristic over your goal, constraints, and examples to flag likely contradictions or scope mismatches before you send the prompt.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
Add examples if you have them
Missing examples slightly raises risk, since ambiguity that examples would resolve stays unresolved.
Review flagged issues
Each flag names the specific conflicting terms found, so you can resolve or dismiss it quickly.
Continue learning: Writing prompts for coding agents
Frequently asked questions
Does this catch every contradiction?
No — it's a simple keyword heuristic that catches common opposing-term patterns, not a full logical or semantic contradiction detector.
Why did it flag something that isn't really contradictory?
The heuristic looks for keyword pairs appearing anywhere in the text, so it can flag false positives when both terms are used in unrelated contexts — use judgment on each flag.
What is the scope-mismatch check?
If your constraints block is far longer than your goal statement, that's a signal the goal itself may be too vague to anchor all the rules attached to it.
Should I still proofread the prompt manually?
Yes, especially for high-stakes prompts — this tool is a fast first pass, not a replacement for a careful read-through.
How We Compare
| Feature | MVPHub | ChatGPT | Notion |
|---|---|---|---|
| Instant keyword-conflict scan | Included | Not included | Not included |
| No API key or account required | Included | Not included | Included |
| Scope-mismatch heuristic | Included | Not included | Not included |
| Instant result, no round-trip request needed | Included | Not included | Not included |
A general-purpose assistant can reason about contradictions more deeply if you ask it to, but that costs a request and isn't instant. This tool runs the fast, transparent first pass with no round trip.
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