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: P(z) -> T(z). exists z: T(z) <-> W_1(z). forall z: ~W_1(z).
exists z: T(z) -> W_1(z) can be inferred via the existential biconditional elimination rule. exists z: W_1(z) -> T(z) can be inferred via the existential biconditional elimination rule. exists z: ~T(z) can be inferred via the existential biconditional elimination rule.