What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will climb a mountain if and only if x_9 is poor. For all x_9, if x_9 climbs a mountain, then x_9 is a janitor. For all x_9, x_9 is not a janitor. There is at least one x_9 for which if x_9 were a janitor, then x_9 is climbing a mountain.
For all x_9, x_9 will not climb a mountain. There is at least one x_9 for which x_9 is a janitor if and only if x_9 will climb a mountain. There is at least one x_9 for which x_9 will climb a mountain if and only if x_9 is a janitor. For all x_9, if x_9 climbs a mountain, then x_9 is poor. For all x_9, if x_9 were poor, then x_9 is climbing a mountain.