What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Charles climbs a mountain, then Mary is driving a car. If Mary drives a car, then Sarah is playing a game. If it is windy, then James is a mechanic. It is windy or Charles is climbing a mountain. If James were a mechanic, then Mary is driving a car.
If Charles climbs a mountain, then Sarah is playing a game. If it is windy, then Mary is driving a car. If James were a mechanic, then Sarah is playing a game.