observation of coffee while roasting commodity

William H. Ukers (author)

• family coffee roaster has mica window to enable observation of coffee while roasting 1840
  assertsneutralsource: coffee-pg28500

  a family coffee roaster having a mica window to enable the operator to observe the coffee while roasting

  judge verdicts (2)

  • groundedness 1.00 pass — The claim is directly stated in the passage: 'In 1840, Abel Stillman, Poland, N.Y., was granted a United States patent on a family coffee roaster having a mica window to enable the operator to observe the coffee while roasting.' The subject, predicate, and object are all explicitly supported without any rewording or outside knowledge required.
  • qualifier_fidelity 0.95 pass — All qualifiers are faithful to the passage. The viewpoint is correctly 'author' as the passage presents this as historical fact rather than attributing it to a named source. The stance 'asserts' and sentiment 'neutral' match the passage's presentation. The time '1840' corresponds exactly to the patent grant date. The context is empty, which is appropriate as the passage does not restrict the claim to a particular sense or role. The quote is verbatim from the passage and directly supports the claim. Minor note: valid_from and valid_to are not part of the standard schema being evaluated, but the 'when' field is accurate.