What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Elisabeth is driving a car. It is windy if and only if Charles is a bartender. If it is windy, then Richard is climbing a mountain. It is windy or Richard is not climbing a mountain. If Charles were a bartender, then Elisabeth is not driving a car.
Charles is not a bartender. If Richard climbs a mountain, then it is windy. If it is windy, then Charles is a bartender. If Charles were a bartender, then it is windy.