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: exists x: P_3(x) or R_2(x). forall x: R_2(x) -> W_2(x). forall x: R_3(x) -> W_2(x). forall x: ~P_3(x) or R_3(x). forall x: W_2(x) -> W_3(x).
forall x: R_2(x) -> W_3(x) can be inferred via the universal transitivity rule. forall x: R_3(x) -> W_3(x) can be inferred via the universal transitivity rule. exists x: R_2(x) or R_3(x) can be inferred via the existential resolution rule.