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 not climb a mountain. There is at least one x_9 for which if x_9 climbs a mountain, then x_9 is bored. For all x_9, if x_9 were bored, then x_9 is climbing a mountain. For all x_9, x_9 is a taxi driver if and only if x_9 is bored.
For all x_9, x_9 is not bored. There is at least one x_9 for which x_9 will climb a mountain if and only if x_9 is bored. There is at least one x_9 for which x_9 is bored if and only if x_9 will climb a mountain. For all x_9, if x_9 were a taxi driver, then x_9 is bored. For all x_9, if x_9 were bored, then x_9 is a taxi driver.