Glassware and comparison strength should fit the question. The 20% target is practitioner guidance, not a universal optimum. Keep native-strength and diluted observations separate; adding water to a fixed whisky pour does not reduce its ethanol amount.
The tasting chapter specifies glass shape, initial nosing, dilution, and comparison conditions.
Wishart recommends narrow-mouth nosing glasses, recording full-strength impressions first, then bringing samples to a consistent alcoholic strength before comparison so proof and glassware do not vary across the flight.
PDF sheet 81
PDF sheet 79
Tasting Whisky
Verified against the searchable local ebook and rendered images of PDF sheets 79–81 during the complete 623-sheet review.
Evidence
Wishart recommends narrow-mouth nosing glasses, recording full-strength impressions first, then bringing samples to a consistent alcoholic strength before comparison so proof and glassware do not vary across the flight.
Locator
Locator type: Page
Start: PDF sheet 79
End: PDF sheet 81
Source section: Tasting Whisky
Context
The tasting chapter specifies glass shape, initial nosing, dilution, and comparison conditions.
Annotation
Glassware and comparison strength should fit the question. The 20% target is practitioner guidance, not a universal optimum. Keep native-strength and diluted observations separate; adding water to a fixed whisky pour does not reduce its ethanol amount.
Verification
Status: Verified
Verified against the searchable local ebook and rendered images of PDF sheets 79–81 during the complete 623-sheet review.