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 x_8: T(x_8) <-> S(x_8). forall x_8: S(x_8) and Q_3(x_8).
forall x_8: S(x_8) can be inferred via the universal simplification rule. forall x_8: Q_3(x_8) can be inferred via the universal simplification rule. forall x_8: T(x_8) -> S(x_8) can be inferred via the universal biconditional elimination rule. forall x_8: S(x_8) -> T(x_8) can be inferred via the universal biconditional elimination rule.