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the claim
NFPA flammability ratings are defined by specific flash point thresholds.
the verdict
COMMON KNOWLEDGE
no citation needed for this one
refutedsupported
the weight of evidence
no sources on either side

NFPA flammability ratings, such as those in NFPA 704, are standard safety classifications defined by specific flash point thresholds and other physical property criteria; no citation is needed for this established definitional fact.

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The analysis

The claim states that NFPA flammability ratings are defined by specific flash point thresholds. This is a matter of standard safety definitions and codes (such as NFPA 704), making it common knowledge by definition and everyday professional observation in fire safety and chemistry. Therefore, following the instructions for STEP 0, the verdict is COMMON_KNOWLEDGE and no citation indices are attached.

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first checked04 Aug 2026
judged → COMMON KNOWLEDGE · 9504 Aug 2026
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