What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x: ~R_1(x) or R_6(x). forall x: ~P(x). forall x: R_1(x) or T(x). forall x: T(x) <-> P(x).
forall x: T(x) or R_6(x). forall x: T(x) -> P(x). forall x: P(x) -> T(x). forall x: ~T(x).