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