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 y: P_4(y) -> Q(y). forall y: T_4(y) -> P_4(y). forall y: Q(y) -> W(y). forall y: W(y) -> T_4(y).
forall y: Q(y) -> T_4(y) can be inferred via the universal transitivity rule. forall y: W(y) -> P_4(y) can be inferred via the universal transitivity rule. exists y: P_4(y) -> W(y) can be inferred via the existential transitivity rule. exists y: T_4(y) -> Q(y) can be inferred via the existential transitivity rule.