Mr. Horsley
- decoctions from chicory and coffee yields_precipitate_with sulphate of copper ⟨when mixed and treated with the salt in a porcelain dish⟩
Both decoctions yield a precipitate; that from chicory being a clay yellow, and that from coffee a sepia brown.
judge verdicts (4)
- groundedness 0.70 pass — The passage states that both decoctions (chicory and coffee) yield a precipitate when treated with sulphate of copper, with distinct colors for each: chicory yields a clay yellow precipitate, and coffee yields a sepia brown precipitate. The claim is essentially supported, though it omits the color detail; thus, it scores slightly below 1.0 due to minor omission.
- qualifier_fidelity 0.60 fail — The claim contains several unfaithful qualifiers: - **Viewpoint**: The passage attributes the observation to Mr. Horsley, not a generic "author". - **Context**: The passage describes the effect of bi-chromate on diluted coffee and chicory decoctions, but does not explicitly state that decoctions from chicory *alone* yield a precipitate with sulphate of copper; it only notes that both decoctions (when mixed) produce precipitates of different colors when copper sulfate is added. - **Quote**: The provided quote does not directly support the claim about precipitation; it discusses color changes, not precipitate formation. To be faithful, the claim should reference Mr. Horsley as the source, clarify that both decoctions (when mixed) yield precipitates upon addition of copper sulfate, and omit unsupported context about a sole chicory decoction reaction.
- groundedness 1.00 pass — The claim is directly stated in the passage: 'Both decoctions yield a precipitate; that from chicory being a clay yellow, and that from coffee a sepia brown.' This matches the subject (decoctions from chicory and coffee), predicate (yields precipitate with), and object (sulphate of copper) as described.
- qualifier_fidelity 0.90 pass — All qualifiers are faithful to the passage except for a minor normalization issue in the 'context' field. The context should explicitly mention the treatment with bi-chromate of potash (the salt) rather than just stating it is 'when mixed and treated with the salt'. Otherwise, viewpoint, stance, sentiment, time, and quote are all accurately reflected.