William H. Ukers (author)
Acker's "percolator" (1905)
judge verdicts (2)
- groundedness 0.70 pass — The passage directly lists 'Acker's "percolator" (1905)' in the filtration devices index, confirming both the device name and the year 1905. The date is stated but the specific word 'patented' is not used in the passage, though the context of a filtration devices list with dates typically indicates patent or introduction dates.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful. The quote appears verbatim in the passage under 'Filtration devices'. The date (1905) matches the temporal information provided. The viewpoint is appropriately attributed to the author (presenting factual information from the index). The stance is neutral assertion, matching how the passage presents this historical fact. Context is empty as the passage provides none beyond identifying it as a filtration device. Time qualifiers correctly reflect 1905 as both when and valid_from with null valid_to.