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_6, x_6 is an office clerk and x_6 is a lawyer. For all x_6, x_6 will listen to a song or x_6 is not an office clerk.
For all x_6, x_6 is an office clerk can be inferred via the universal simplification rule. For all x_6, x_6 is a lawyer can be inferred via the universal simplification rule. For all x_6, if x_6 were an office clerk, then x_6 is listening to a song can be inferred via the universal rewriting rule.