What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: exists z_3: P_3(z_3) -> T(z_3). forall z_3: T(z_3) -> P(z_3). forall z_3: P(z_3) <-> P_3(z_3).
exists z_3: P_3(z_3) -> P(z_3) can be inferred via the existential transitivity rule. forall z_3: P(z_3) -> P_3(z_3) can be inferred via the universal biconditional elimination rule. forall z_3: P_3(z_3) -> P(z_3) can be inferred via the universal biconditional elimination rule.