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: forall x_7: ~P_7(x_7). forall x_7: P_7(x_7) or P(x_7). ~P(a_3) or r.
forall x_7: P(x_7) can be inferred via the universal disjunctive syllogism rule.