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_4: T_4(y_4) or ~U(y_4). forall y_4: U_3(y_4) -> U(y_4). forall y_4: T_4(y_4) -> U_3(y_4).
forall y_4: T_4(y_4) -> U(y_4) can be inferred via the universal transitivity rule. exists y_4: U(y_4) -> T_4(y_4) can be inferred via the existential rewriting rule.