What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_1: Q(x_1) -> T_2(x_1). forall x_1: T_2(x_1). forall x_1: T_2(x_1) -> Q(x_1).
forall x_1: Q(x_1). forall x_1: Q(x_1) <-> T_2(x_1). forall x_1: T_2(x_1) <-> Q(x_1).