From a known list of selected wines. That makes it a lot easier if you can look.It was blind in the sense that he does not know what wine he is drinking, he is supposed to tell where in the world the wine came from and what year it is.
Yes, once you do a truly blind test, where the glass is blackened, it is extremely hard to tell wines apart. Even white and red wines get mixed up regularly this way.According to this documentary, there is this whole Master Sommelier certification that very few people have achieved. The certification, requires one to pass a tasting test in identifying the wine by smell and taste alone.
