You can learn more about their possible hands by observing which cards they are picking up or discarding. An opponent may be indicating that they are not jili appspursuing a run that includes a 9 of clubs if they discard that card. When choosing which cards to keep or discard, you can use this information as a guide. Also, you can deceive your opponents about the strength of your hand by discarding cards that might appear valuable to them. This is known as bluffing.