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_3, x_3 is a bartender or x_3 is a musician. For all x_3, x_3 is rich. For all x_3, x_3 is not a bartender.
For all x_3, x_3 is a musician can be inferred via the universal disjunctive syllogism rule.