Supporting citations use verified paraphrases and PDF-sheet locators from the canonical local copies.
A compound or sensory note becomes a fault only relative to its concentration, the surrounding whiskey matrix, the target style, the evaluation method, and the intended use; presence alone is insufficient.
Reviewed 2026-08-29 against the cited source pages during the complete text-and-visual corpus pass.
The diacetyl example is practitioner guidance; exact thresholds and acceptability must be measured in the target whiskey and use context.
The same compound can shift from pleasant to defective with concentration, while detection and recognition depend on matrix and person.
Created from a deduplicated cross-source synthesis; retain the stated qualifications when drafting. Fresh Goode audit: PDF320–323 distinguishes detection, recognition and rejection and qualifies reference spikes. Wine thresholds do not become whiskey cutoffs; sensory acceptability does not establish safety.