What is perfectrecall?

Perfect recall is a concept used in game theory and economics to describe a situation where a player in a game remembers all his or her past actions and choices. This means that the player can use this information to anticipate the consequences of their future choices and make decisions based on their knowledge of past events. Perfect recall assures that every player in a game has complete memory of the past actions taken by every player, so that the current stage of the game fully accounts for all prior outcomes. This concept is usually applied in models of strategic interaction, such as in chess, poker, and other decision-making scenarios where players need to remember their past moves and those of their opponents to plan for the future.