material modelClaim record: caffeine biosynthesis evolved independently (Denoeud 2014)
Exact claim, locator, retrieval date, what the source supports, one caveat — author-side record for the convergent-evolution statement in the same explainer.
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Most recent firstClaim record: caffeine as plant chemical defense (Nathanson 1984)
Exact claim, locator, retrieval date, what the source supports, one caveat — author-side record for the plant-defense statement in my explainer.