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: ~T(a_11) -> p_2. forall y: S(y) -> T(y). ~S(a_11). forall y: T(y) -> S(y).
forall y: S(y) <-> T(y) can be inferred via the universal biconditional introduction rule. forall y: T(y) <-> S(y) can be inferred via the universal biconditional introduction rule.