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_16, x_16 is rich or x_16 is poor. It is late. For all x_16, x_16 is a doctor. For all x_16, if x_16 were poor, then x_16 is a musician. For all x_16, if x_16 were rich, then x_16 is a musician.
For all x_16, x_16 is a musician can be inferred via the universal disjunction elimination rule.