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_3: W(y_3) -> U_4(y_3). forall y_3: U(y_3) -> W(y_3). forall y_3: S(y_3) -> U(y_3).
forall y_3: S(y_3) -> W(y_3) can be inferred via the universal transitivity rule. exists y_3: U(y_3) -> U_4(y_3) can be inferred via the existential transitivity rule.