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 y: ~S(y). forall y: W_2(y) <-> S(y). forall y: S(y) <-> W_2(y).
forall y: W_2(y) -> S(y) can be inferred via the universal biconditional elimination rule. forall y: S(y) -> W_2(y) can be inferred via the universal biconditional elimination rule. forall y: S(y) -> W_2(y) can be inferred via the universal biconditional elimination rule. forall y: W_2(y) -> S(y) can be inferred via the universal biconditional elimination rule. forall y: ~W_2(y) can be inferred via the universal biconditional elimination rule. forall y: ~W_2(y) can be inferred via the universal biconditional elimination rule.