What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, x_6 will not write a letter. For all x_6, if x_6 were a cashier, then x_6 is playing a game. For all x_6, if x_6 takes a plane, then x_6 is writing a letter. There is at least one x_6 for which if x_6 plays a game, then x_6 is taking a plane.
For all x_6, x_6 will not take a plane. There is at least one x_6 for which if x_6 plays a game, then x_6 is writing a letter. There is at least one x_6 for which if x_6 were a cashier, then x_6 is taking a plane.