What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, if x_13 climbs a mountain, then x_13 is a bartender. For all x_13, x_13 is a janitor if and only if x_13 will climb a mountain. For all x_13, if x_13 were a bartender, then x_13 is taking a plane. There is at least one x_13 for which x_13 will drive a car if and only if x_13 is a janitor. For all x_13, x_13 will not take a plane. For all x_13, if x_13 takes a plane, then x_13 is a bartender.
For all x_13, x_13 is not a bartender. For all x_13, if x_13 climbs a mountain, then x_13 is taking a plane. For all x_13, x_13 is a bartender if and only if x_13 will take a plane. For all x_13, x_13 will take a plane if and only if x_13 is a bartender. For all x_13, if x_13 were a janitor, then x_13 is climbing a mountain. There is at least one x_13 for which if x_13 drives a car, then x_13 is a janitor. For all x_13, if x_13 climbs a mountain, then x_13 is a janitor. There is at least one x_13 for which if x_13 were a janitor, then x_13 is driving a car.