What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? u. ~T(e). forall z_2: P_1(z_2) <-> T(z_2).
u and ~T(e). ~T(e) and u. forall z_2: P_1(z_2) -> T(z_2). forall z_2: T(z_2) -> P_1(z_2).