Final answer:
Alcohol impairs judgment by allowing emotions to override logic, affecting mood and behavior, and diminishing self-control.
Step-by-step explanation:
When the use of alcohol impairs an individual's judgment and reason, emotions override logic. This occurs because alcohol affects the central nervous system, which in turn can alter a person's mood, behavior, and cognitive functioning. When someone consumes alcohol, it can lead to a decrease in self-control, and the emotional part of the brain can become more active than the logical part. This shift can result in actions and decisions that are more emotionally driven rather than based on rational thought and judgment.