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: Q(z) -> W(z). u_4. forall z: W(z) -> Q(z). Q(c) -> ~u_4.
~Q(c) can be inferred via the modus tollens rule. forall z: Q(z) <-> W(z) can be inferred via the universal biconditional introduction rule. forall z: W(z) <-> Q(z) can be inferred via the universal biconditional introduction rule.