What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: S_1(x) -> P_1(x). forall x: P(x) <-> T(x). forall x: S(x) -> S_1(x). forall x: ~S(x). forall x: P(x) <-> P_1(x). forall x: P_1(x) -> S(x).
forall x: ~P_1(x). forall x: S_1(x) -> S(x). forall x: S(x) -> P_1(x). forall x: P_1(x) -> S_1(x). forall x: P(x) -> T(x). forall x: P(x) -> P_1(x). forall x: T(x) -> P(x). forall x: P_1(x) -> P(x).