In a blind tasting, a person judging a glass of wine doesn't know which bottle it came from. He or she usually knows which wines are being tasted, but not the order in which they're presented (the bottles are usually hidden by a brown paper bag). Blind tastings are done so that a label won't influence the taster's impression. In a double-blind tasting, neither the wines nor the order are known. One of the most famous blind tastings was the legendary Paris tasting test of 1976, in which France's top white Burgundies were outscored by a (gasp!) Napa Valley '73 Ch√Ęteau Montelena Chardonnay.