Vertical vs. horizontal tasting

Name: Domaine aux Conseillans
Address: 35 Chemin du Limancet, Saint-Caprais-de-Bordeaux, Nouvelle-Aquitaine, 33880, FR
Telephone: +33619700435
Price range: €€

The standard

The controlled comparison axis holds everything constant but one variable: in the vertical the wine, in the horizontal the vintage. Only so can the observed difference be ascribed to that one variable.

Criteria

Exactly one variable changes, all others stay equal
Vertical means: one wine, many vintages
Horizontal means: one vintage, many wines
The tasting conditions are equal for all samples

Distinction

Vertical ≠ horizontal: one axis holds the wine fixed, the other the vintage. The controlled comparison axis determines which question a tasting can answer at all.