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 y: U_1(y) -> R_2(y). forall y: R_2(y) -> W(y). exists y: U_1(y) or ~S_3(y).
forall y: U_1(y) -> W(y) can be inferred via the universal transitivity rule. exists y: S_3(y) -> U_1(y) can be inferred via the existential rewriting rule.