What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If it is sunny, then James is climbing a mountain. It is sunny if and only if it is overcast. If James climbs a mountain, then it is raining. It is not raining.
James is not climbing a mountain. If it is sunny, then it is overcast. If it is overcast, then it is sunny.