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_4: Q(z_4) <-> T(z_4). forall z_4: Q(z_4) -> P(z_4). forall z_4: ~P(z_4).
forall z_4: ~Q(z_4) can be inferred via the universal modus tollens rule. exists z_4: Q(z_4) -> T(z_4) can be inferred via the existential biconditional elimination rule. exists z_4: T(z_4) -> Q(z_4) can be inferred via the existential biconditional elimination rule.