Unreliability refers to the inconsistency or lack of dependability in a person, object, or system. When something is deemed unreliable, it may fail to perform as expected or provide accurate information. This can lead to confusion, mistakes, or negative outcomes, especially in critical situations. In various contexts, such as technology, relationships, or data sources, unreliability can significantly impact decision-making. For instance, an unreliable internet connection can disrupt communication, while an unreliable friend may not be there when needed. Understanding and identifying unreliability is essential for improving trust and effectiveness in different areas of life.