According to Mark Twain, "Whiskey is for drinking; _____________ is for fighting!"

The correct answer is water, as attributed to Mark Twain's witticism. This phrase captures a humorous juxtaposition between two seemingly mundane elements in life: whiskey, associated with leisure and enjoyment, and water, which is often seen as a basic necessity. The expression implies that while whiskey is meant for relaxation and socializing, water serves a more primal and essential role in human conflict. The idea reinforces the notion that water can symbolize survival and the fundamental needs that drive people, often leading to altercations or disputes over this critical resource. This clever contrast showcases Twain’s sharp sense of humor and insight into human behavior, indicating that while indulgence is enjoyable, the essential needs of life, represented by water, are what often fuel disputes.