What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, z will climb a mountain if and only if z will go running. Mary is climbing a mountain.
There is at least one x for which x will climb a mountain. For all z, if z climbs a mountain, then z is running. For all z, if z goes running, then z is climbing a mountain.