What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_18, x_18 is a carpenter. For all x_18, x_18 will go running or x_18 is a police officer. For all x_18, if x_18 goes running, then x_18 is climbing a mountain. There is at least one x_18 for which x_18 will not climb a mountain. For all x_18, if x_18 climbs a mountain, then x_18 is running.
There is at least one x_18 for which x_18 will not go running. For all x_18, x_18 will go running if and only if x_18 will climb a mountain. For all x_18, x_18 will climb a mountain if and only if x_18 will go running.