None (conceptual absence)

None (conceptual absence) refers to the complete lack or emptiness of something—an absence of any value, object, or condition. It symbolizes the state where nothing exists in a particular place or context. For example, if a glass is empty, it contains none of the liquid. In philosophy or programming, "none" indicates the absence of a value or data. It helps us understand situations where something is deliberately missing or nonexistent, providing clarity in distinguishing between presence and complete absence.