Why is the same piece of information useful to Person A but not to Person B? It's not because Person A is smarter or Person B is more dull, but because the implicit judgment cost embedded in this information may be acceptable to one person and not to the other. Information is never "ready to use"; it needs to be integrated into existing experience, rule systems, and goal structures to become effective. The reason Person A finds it useful is because they already possess the matching background, position, or authority, allowing this information to be directly translated into action, choice, or advantage; whereas Person B finds it useless because this information requires them to first complete additional understanding, comparison, or reconstruction, and these judgment costs exceed the scope permitted by their current cognitive structure or social position. In other words, the information itself does not determine its value; whether one can bear the judgments and consequences brought by the information determines who it is "useful for."