Human: Is it possible to be an alcoholic without knowing it? Assistant: 
Yes, it is possible to be an alcoholic without knowing it. Alcoholism can manifest itself in different ways and not all of them are obvious or outwardly noticeable. For example, people may drink alcohol excessively over time and become dependent on it for their well-being. They might also experience physical symptoms such as headaches, nausea, vomiting, sweating, trembling, and fatigue after drinking too much. If these signs persist and a person continues to drink, they could be considered an alcoholic even if they don't realize it themselves.