What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Richard is climbing a mountain or John is not running. Elisabeth is not drinking water. If Richard climbs a mountain, then John is running. John is running if and only if Elisabeth is drinking water.
If John goes running, then Richard is climbing a mountain. If John goes running, then Elisabeth is drinking water. If Elisabeth drinks water, then John is running. John is not running.