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: Joseph is listening to a song or Sarah is a musician. If Sarah were a musician, then Joseph is a janitor. For all x_14, if x_14 listens to a song, then x_14 is a janitor. If Joseph were a janitor, then it is windy.
Nothing can be inferred from these premises.