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