What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, x_8 will not take a plane. For all x_8, x_8 is a cashier if and only if x_8 will play a game. For all x_8, if x_8 takes a plane, then x_8 is playing a game. For all x_8, x_8 will play a game if and only if x_8 will take a plane.
For all x_8, if x_8 were a cashier, then x_8 is playing a game. For all x_8, if x_8 plays a game, then x_8 is taking a plane. For all x_8, if x_8 plays a game, then x_8 is a cashier. For all x_8, if x_8 takes a plane, then x_8 is playing a game. For all x_8, x_8 will not play a game.