What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_6: T(x_6) -> P_4(x_6). forall x_6: ~P_3(x_6). forall x_6: P_4(x_6) -> T(x_6). forall x_6: P_3(x_6) <-> P_4(x_6).
exists x_6: T(x_6) <-> P_4(x_6). exists x_6: P_4(x_6) <-> T(x_6). forall x_6: P_3(x_6) -> P_4(x_6). forall x_6: P_4(x_6) -> P_3(x_6). forall x_6: ~P_4(x_6).