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: forall z_4: P(z_4) -> ~P_1(z_4). forall z_4: P_1(z_4). p <-> P(a_5).
p -> P(a_5) can be inferred via the biconditional elimination rule. P(a_5) -> p can be inferred via the biconditional elimination rule. forall z_4: ~P(z_4) can be inferred via the universal modus tollens rule.