What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Charles is climbing a mountain or it is snowing. If it snows, then it is raining. Charles is climbing a mountain if and only if it is raining. For all x, x is a soldier.
If Charles climbs a mountain, then it is raining. If it rains, then Charles is climbing a mountain.