The article discusses how dealing with missing and conflicting information is a big challenge in games. It explains that imperfect information in games happens when a player doesn't know where they are in the game, while incomplete information is when a player doesn't know what their opponent will do next. The researchers show how games with incomplete information can be understood using rough sets, which are a way to handle missing and conflicting information in decision-making. They demonstrate how a game with incomplete information can be mapped onto a rough decision table.