William H. Ukers (author)
_C. humboltiana_, which contains no caffein, but a bitter principle, cafemarin
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage. The text explicitly says '_C. humboltiana_, which contains no caffein, but a bitter principle, cafemarin,' which fully supports the subject-predicate-object relationship that C. humboltiana contains cafemarin.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to the author (not a named source). The stance is 'asserts' which matches the passage's straightforward presentation. Sentiment is neutral, appropriate for a factual botanical claim. Time qualifiers are null as the passage provides no temporal scope. The context 'instead of caffein' accurately reflects the passage's framing that C. humboltiana contains cafemarin rather than caffein. The quote is verbatim and directly supports the claim.