What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_3 for which x_3 will sleep or x_3 will not climb a mountain. For all x_3, if x_3 sleeps, then x_3 is climbing a mountain.
There is at least one x_3 for which if x_3 climbs a mountain, then x_3 is sleeping.