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