A published verdict on a bottle often rests on more than one tasting, separated by weeks or months. The repetition exists because a single session cannot distinguish the product from the circumstances of tasting it.
What varies between two tastings of one wine
Bottles differ from one another, particularly under cork, where the seal is a natural product with variable permeability.
Storage history varies too. Two bottles from the same case can have traveled differently and arrived in measurably different condition.
Retasting samples that variation instead of assuming it away, which is the only way to tell whether an unusual result came from the wine or from the bottle.
How the taster changes between sessions
Sensitivity shifts with time of day, recent meals, illness and simple fatigue, and none of these are visible to the taster in the moment.
Context shifts as well. A bottle assessed immediately after several powerful samples reads differently than the same bottle opened first.
Repeating the assessment on a separate day under different conditions separates the stable impression from the one that happened to form once.
Why young bottles move the most
Recently released wines and spirits continue to change, and a young structured red in particular can be closed on release and open a year later.
Reviewers who taste at release therefore often revisit, and some publications indicate when a note reflects a bottle assessed early in its life.
Spirits are more stable once bottled, so retasting there is aimed less at development and more at batch variation between releases.
What batch variation does to a verdict
Products assembled in batches rather than a single large blend can differ noticeably from one release to the next, even under an unchanged label.
A review of one batch is therefore a review of that batch, and careful notes record the identifying information printed on the bottle.
Where a producer moves toward continuous blending, variation narrows, and a single assessment carries further than it would otherwise.
Why the practice rarely makes it into the published note
Readers see a score and a paragraph, not the number of sessions behind them, so the work of repetition is largely invisible.
Some publications state their methodology separately, including whether tasting was blind and how many samples informed a given note.
Reading that methodology tells a reader more about the reliability of a score than the score itself does, which is why serious outlets publish it at all.