What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, if x climbs a mountain, then x is working. For all x, x will work if and only if x will climb a mountain. For all x, x will not climb a mountain.
For all x, if x works, then x is climbing a mountain. For all x, if x climbs a mountain, then x is working. For all x, x will not work.