Most people leak their intentions constantly. Not through confession, but through the small signals they cannot help sending — the questions they ask, the things they avoid, the enthusiasm that surfaces at the wrong moment. Greene argues that this leakage is one of the most common and costly mistakes in any competitive environment. If the people around you can read what you want, they can position themselves ahead of you, block you quietly, or simply wait until your hand is fully visible before they respond. But silence alone is not enough — it can raise suspicion on its own. A person who suddenly goes quiet, who stops sharing plans they used to discuss freely, who becomes guarded where they were once open, may actually draw more attention than before. The target notices the absence of information and starts looking harder. That is the trap Greene identifies at the center of Law 3: concealment is not the same as hiding. Hiding creates a void. What Greene is describing is something more active — filling the space with a story that satisfies the other person's need to understand, so they stop looking. The distinction matters. When you give someone a plausible explanation for your behavior, even a false one, you are not just withholding the truth. You are answering the question they were about to ask. And once a person believes they have understood your motive, Greene argues, they tend to stop investigating. The curiosity is resolved. The suspicion dissolves. And whatever you are actually doing proceeds without interference. Greene presents Otto von Bismarck as one of the clearest illustrations of this principle in action. Bismarck's ambitions for Prussian dominance were enormous, but he did not announce them. He cultivated a reputation for moderation, for reasonableness, for being the kind of statesman who preferred negotiation to confrontation. His opponents read him as a pragmatist, someone they could work with, someone who understood limits. That reading was the decoy. While they operated from that picture of him, Bismarck moved toward objectives they had not anticipated, because the picture they were working from was incomplete. He gave them something to believe, and they believed it. The contrast Greene draws with Ninon de Lenclos works differently but follows the same logic. Where Bismarck used the appearance of political moderation, de Lenclos used the appearance of emotional openness. She seemed warm, accessible, transparent about her feelings — and that apparent transparency was itself the misdirection. Her admirers thought they understood her because she seemed to offer herself freely. What they were actually receiving was a carefully managed performance of openness, one that kept them engaged and guessing without ever giving them the real picture. The surface was inviting. The interior remained controlled. What connects these two examples, in Greene's account, is not the specific tactic but the underlying mechanism. In both cases, the target's need to understand is met with something believable. Bismarck's opponents got a coherent story about a reasonable statesman. De Lenclos's admirers got a coherent story about an emotionally available woman. Neither story was the full truth. But both were plausible enough to satisfy, and satisfaction is what stops the search. Greene names the tools here as decoys and red herrings on one side, and bland or friendly behavior masking competitive intent on the other. The first sends people in the wrong direction by giving them a false trail to follow. The second works by making the concealer appear so ordinary, so unthreatening, so easy to read, that no one thinks to look more carefully. Both depend on the same human tendency: once we think we understand something, we move on. That tendency is what makes this law work. And it is also what makes it dangerous to underestimate in others.