<human>: How do you tell a good wine from a bad one?
<bot>: The best way to tell if a wine is good or not is by tasting it. You can look for certain characteristics such as sweetness, acidity, and tannins that indicate the quality of the wine. Additionally, you should pay attention to how the wine tastes when you first take a sip, as well as its finish. If it has a pleasant flavor with a long-lasting aftertaste, then chances are it's a good bottle of wine!