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