William H. Ukers (author)
Preterre's vacuum (1849)
judge verdicts (2)
- groundedness 0.70 pass — The passage lists 'Preterre's vacuum (1849)' in a comprehensive index of percolators, which directly indicates that Preterre created a vacuum percolator in 1849. While the passage does not explicitly use the word 'invented,' the listing format clearly attributes this percolator design to Preterre with the associated date.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to 'author' (the passage does not attribute this to a named source beyond Preterre). The stance 'asserts' is appropriate as the passage presents this as factual information without dispute markers. The sentiment is neutral, matching the passage's tone. The time qualifier correctly reflects '1849' as stated in the passage. The context is appropriately empty as the passage does not restrict this to a particular sense or role beyond being a percolator type. The quote 'Preterre's vacuum (1849)' appears verbatim in the passage and supports the claim that Preterre's vacuum percolator was invented in 1849.