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: For all x_9, x_9 is excited or x_9 will not listen to a song. For all x_9, x_9 will listen to a song or x_9 is not excited.
For all x_9, if x_9 listens to a song, then x_9 is excited can be inferred via the universal rewriting rule. For all x_9, if x_9 were excited, then x_9 is listening to a song can be inferred via the universal rewriting rule.