William H. Ukers (author)
evaporate 50 cc. of filtrate to dryness in a flat-bottomed dish, dry at 100 deg. C.
judge verdicts (2)
- groundedness 0.70 pass — The passage directly states that filtrate is evaporated to dryness and dried at 100 deg. C. The claim's predicate 'evaporated to dryness and dried at temperature' with object 'heat' is a minor rewording of the explicit procedural steps in the first section, making it well-supported though not perfectly verbatim.
- qualifier_fidelity 0.90 pass — The claim is largely faithful to the passage. The quote is verbatim and accurately represents the procedure. The perspective (viewpoint: "author", stance: "asserts", sentiment: "neutral") correctly reflects that this is an official procedure presented as instruction. The time qualifier "after filtration" is appropriate and supported by the passage's sequential steps. The context "drying step" is accurate. Minor note: The claim's predicate "evaporated to dryness and dried at temperature" could be more precisely worded to match the passage's "evaporate to dryness" followed by "dry at 100 deg. C." as two distinct operations, but this is a matter of phrasing rather than qualifier fidelity. All required qualifiers are faithful to the passage.
titrate with N/10 hydrochloric acid, using methyl orange as an indicator
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly supported by the passage. Section 10 explicitly states 'Cool the filtrate from 9 and titrate with N/10 hydrochloric acid, using methyl orange as an indicator,' which matches the subject-predicate-object structure with the specified context of methyl orange as indicator.
- qualifier_fidelity 0.85 pass — The claim is largely faithful to the passage. The viewpoint, stance, sentiment, time, and context qualifiers are all appropriate. However, there is a minor issue with the quote attribution: the quote should more precisely be 'titrate with N/10 hydrochloric acid, using methyl orange as an indicator' which does appear verbatim in the passage under section 10. The only minor deduction is that the claim could be more specific about this being the 'filtrate from 9' rather than just 'filtrate', but this is implicit in the context of the passage structure and does not substantially undermine fidelity.
- filtrate yields color upon addition of phenolphthalein and standard alkali ⟨pink color after two fillings⟩
the filtrate from two fillings of the filter yields a pink color upon the addition of phenolphthalein and one drop of the standard alkali
judge verdicts (2)
- groundedness 0.70 pass — The claim is substantially supported by the passage. The text explicitly states that 'the filtrate from two fillings of the filter yields a pink color upon the addition of phenolphthalein and one drop of the standard alkali.' The claim accurately captures this requirement, though it slightly rewords 'one drop of the standard alkali' as simply 'standard alkali,' which is a minor rewording that doesn't substantively alter the meaning.
- qualifier_fidelity 0.75 pass — One qualifier issue: the claim states the filtrate 'yields color upon addition of phenolphthalein and standard alkali,' but the passage specifies it yields a PINK color specifically. The object should be more precise - it's not just any color from adding those substances, but specifically pink. The quote is verbatim and accurate, perspective/stance/sentiment are correct (neutral assertion by the author), time qualifiers are appropriately null, and context correctly specifies 'pink color after two fillings.' Minor precision issue in the object predicate but overall fidelity is high enough to pass.
The filtrate contains tannin, caffein, color, and fat
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage: 'The filtrate contains tannin, caffein, color, and fat.' This is an exact quote from the text with no rewording or interpretation required.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to the author (the passage presents this as a procedural description without naming a specific source). The stance correctly reflects assertion. The sentiment is appropriately neutral for a technical/procedural statement. The time qualifiers are correctly set to null as the passage provides no temporal scope. The context is appropriately empty as no specific context restriction is given. The quote appears verbatim in the passage and directly supports the claim.