Claim Diagnostic
Enter any claim — from a news headline to a business proposition to a medical recommendation — and walk it through the six constraints of semantic validity.
How to Read the Diagnostic
The diagnostic presents six questions — one for each constraint. These are not opinion questions. They are structural checks. For a claim to be known to be valid, every constraint must be satisfiable.
Important Distinction
This tool does not determine whether a claim is true. Truth is a property of correspondence with reality. Validity is a property of structural completeness. A claim can be true and structurally incomplete. A claim cannot be known to be valid unless all six constraints are satisfied. The diagnostic reveals the structure — the judgment remains yours.
Example Claims to Try
"This medication reduces inflammation by 40% in clinical trials." — Who ran the trials? What population? What was the endpoint? For what purpose is this claim being made?
"Our AI system is 95% accurate." — Accurate at what? Measured against what benchmark? Who measured it? Does accuracy serve the actual purpose?
"The economy is improving." — By what measure? Who says so? From what evidence? For whom is it improving, and toward what end?
Understand the Geometry
These six constraints aren't arbitrary. They emerge from the geometry of the tetrahedron. Explore the interactive model →