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