What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: Elisabeth is listening to a song or Jessica is a writer. If John were poor, then it is not snowing. It is snowing or Elisabeth is not listening to a song. If Jessica were a writer, then it is snowing.
If Elisabeth listens to a song, then it is snowing can be inferred via the rewriting rule.