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 z_2, z_2 is a lawyer or z_2 is not a musician. For all z_2, if z_2 listens to a song, then z_2 is a lawyer. For all z_2, z_2 is a musician.
For all z_2, if z_2 were a musician, then z_2 is a lawyer can be inferred via the universal rewriting rule.