See the structure
behind every argument.
The Whetstone analyses the reasoning in any text — what's claimed, what evidence is offered, where the logic breaks down, and the strongest opposing case the writer didn't engage with. Not a verdict on who's right. A structural view of how the argument works.
What the engine analyses
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Argument structure
Toulmin decomposition — claim, grounds, warrant, weakest link. The skeleton of the argument, stripped of rhetoric.
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26 reasoning patterns
From Post Hoc to Motte-and-Bailey, Selection Bias to Genetic Fallacy. Verbatim quotes, severity, confidence.
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Counterarguments
The 2–3 strongest objections a thoughtful opponent would deploy — each with its own Toulmin structure.
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Citation audit
Every cited URL fetched and checked — does the source actually support the claim it's cited for?
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Philosophical commitments
The ethical, epistemic, and political framework the argument operates within — made visible.
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Evidence-weighted likelihood
For empirical claims, we search 200M+ academic papers and assess scientific consensus.
Reader
Audit any argument
Paste text or a URL. The engine maps the structure, flags reasoning issues, and shows you the argument's bones. Free — no account required.
Open the Reader →
Creator
Stress-test your writing
Full audit suite, counterarguments, citation checking, revision tracking, and inline highlights. For students, journalists, and professional writers.
Open Creator Studio →