Frederick B. Goddard (author)
have the phosphorus on sand paper and the other materials on the ends of the splints
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage: 'SAFETY MATCHES have the phosphorus on sand paper and the other materials on the ends of the splints.' The subject, predicate, and relationship to sand paper are all explicitly mentioned without requiring outside knowledge or over-generalization.
- qualifier_fidelity 0.90 pass — The claim's qualifiers are nearly all faithful to the passage. Viewpoint is correctly attributed to 'author' (passage statement, not attributed to a named source), stance is correctly 'asserts', sentiment is neutral as appropriate, time qualifiers are correctly null (no temporal scope given), and context is appropriately empty. The quote is verbatim from the passage. Minor deduction (0.1): the quote omits the opening phrase 'SAFETY MATCHES' and begins mid-sentence with 'have the phosphorus...' rather than presenting the complete sentence structure, though this is a minor presentational issue since the quoted text is accurate and supports the claim.
- SAFETY MATCHES ignite only by friction between phosphorus and sand paper phosphorus and sand paper ⟨safety mechanism of SAFETY MATCHES⟩
SAFETY MATCHES have the phosphorus on sand paper and the other materials on the ends of the splints, and neither can be ignited except by friction with the other
judge verdicts (4)
- groundedness 0.70 pass — The claim is substantially supported by the passage, which states that SAFETY MATCHES have 'the phosphorus on sand paper and the other materials on the ends of the splints, and neither can be ignited except by friction with the other.' The claim uses minor rewording (referring to 'sand paper and splint materials' instead of the more precise technical description), but accurately captures the essential information about how safety matches function.
- qualifier_fidelity 0.65 fail — The quote is accurate and the sentiment and stance are correct. However, there are two qualifier issues: (1) The 'object' is imprecise - the passage states "The splints are sometimes soaked in oil or paraffine" and describes the configuration as "phosphorus on sand paper and the other materials on the ends of the splints," so the object should specify that friction occurs between these two distinct components (phosphorus/materials on splints vs. sand paper), not conflate them as "sand paper and splint materials"; (2) The context should note this describes the safety mechanism of SAFETY MATCHES specifically, not matches in general. The viewpoint, stance, sentiment, and time qualifiers are appropriate.
- groundedness 0.70 pass — The claim is substantially supported by the passage. The passage states that SAFETY MATCHES have phosphorus on sand paper and other materials on splint ends, and that 'neither can be ignited except by friction with the other.' The claim slightly rewords this by specifying 'friction between phosphorus and sand paper,' which is a reasonable interpretation of the passage's statement, though the passage is more general about the friction mechanism.
- qualifier_fidelity 0.85 pass — The claim is largely faithful to the passage. The quote is verbatim and supports the assertion. However, there is a minor imprecision in the predicate: the passage states that phosphorus is ON sand paper and OTHER MATERIALS are on the splint ends, and friction between these two components is required for ignition. The claim's predicate says 'ignite only by friction between phosphorus and sand paper,' which slightly misrepresents the mechanism by implying phosphorus itself provides the friction surface, when in fact it's the phosphorus (on sand paper) interacting with the other materials (on splints). This is a small but notable deviation from the passage's precise description of how the two parts interact. All other qualifiers are faithful: viewpoint (author), stance (asserts), sentiment (neutral), time (null), context (safety mechanism), and quote accuracy are all correct.