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: ~W_1(z). p_3 <-> S(a_5). forall z: W_1(z) <-> S(z).
p_3 -> S(a_5) can be inferred via the biconditional elimination rule. S(a_5) -> p_3 can be inferred via the biconditional elimination rule. forall z: W_1(z) -> S(z) can be inferred via the universal biconditional elimination rule. forall z: S(z) -> W_1(z) can be inferred via the universal biconditional elimination rule. forall z: ~S(z) can be inferred via the universal biconditional elimination rule.