What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Patricia plays a game, then Jessica is a cashier. If Patricia plays a game, then Jessica is a cashier. If Jessica were a cashier, then Patricia is playing a game.
Patricia is playing a game if and only if Jessica is a cashier. Patricia is playing a game if and only if Jessica is a cashier. Jessica is a cashier if and only if Patricia is playing a game. Jessica is a cashier if and only if Patricia is playing a game.