What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z: T(z) <-> P_3(z). ~T(a_7). p <-> P_3(a_7).
p -> P_3(a_7). P_3(a_7) -> p. forall z: T(z) -> P_3(z). forall z: P_3(z) -> T(z).