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_2: S_4(y_2) or ~T(y_2). forall y_2: U(y_2) -> T(y_2). forall y_2: S_4(y_2) -> U(y_2).
forall y_2: S_4(y_2) -> T(y_2) can be inferred via the universal transitivity rule. exists y_2: T(y_2) -> S_4(y_2) can be inferred via the existential rewriting rule.