What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Elisabeth is taking a plane. It is not windy. If Thomas listens to a song, then it is raining. If it rains, then it is windy.
It is not raining. If Thomas listens to a song, then it is windy. Elisabeth is taking a plane and it is not windy. It is not windy and Elisabeth is taking a plane.