William H. Ukers (author)
In 1883, Jabez Burns was granted a United States patent on his improved sample-coffee roaster.
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage. The final sentence explicitly states that in 1883, Jabez Burns was granted a United States patent on his improved sample-coffee roaster, matching all elements of the claim exactly.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to the author (passage states the fact directly), stance is appropriately 'asserts', sentiment is neutral, time is accurately set to 1883, context is appropriately empty, and the quote appears verbatim in the passage and directly supports the claim.