Wine Theory: Viticulture, Vinification, Grapes, Regions, Spirits
Build cause-and-effect chains, not fact lists
Theory questions reward reasoning from cause to result. Start in the vineyard: climate (heat summation, continentality, diurnal range), site (aspect, altitude, soil drainage and water-holding capacity), and vine management (training, canopy, crop load) set the sugar, acid, tannin and aroma precursors you meet in the glass. Know that sugar ripeness and physiological ripeness are not the same thing, and be able to define millerandage, coulure, botrytis, and phylloxera - including why grafting onto American rootstock became standard.
Vinification as a set of levers
Fermentation temperature trades aroma retention against extraction; maceration length and cap management build colour and tannin; malolactic conversion softens acid; lees contact builds texture; oak adds tannin, toast and controlled oxygen, scaled by barrel age and size. Be able to recite the classic white sequence (press, settle, ferment, lees, MLF or not) and red sequence (crush, ferment, macerate, press, élevage).
Varieties, regions, spirits
Anchor each grape to a structural signature and its home region, then to synonyms and diaspora plantings. For spirits, style follows base material, distillation method, aging and dilution. Service knowledge (temperatures, glassware, decanting) bridges into Domain 2.
Traps
Labeling systems follow different logic: AOC and DOCG regulate place and method, while an AVA is a political boundary with no quality guarantee; varietal labeling rules vary by country. Questions swap synonyms (Syrah/Shiraz, Zinfandel/Primitivo, Pinot Grigio/Grauburgunder) or imply an appellation name is a grape. Watch for true-but-irrelevant distractors.
Rule of thumb
High acid, low alcohol, wet-stone and green-apple profile points to a cool climate and an early-ripening white, probably unoaked. Do not name a grape until acid and alcohol agree with your candidate.