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) -> T_2(y). forall y: ~S(y). forall y: S(y) <-> T_2(y). forall y: P_1(y) -> T_2(y).
forall y: S(y) -> T_2(y) can be inferred via the universal biconditional elimination rule. forall y: T_2(y) -> S(y) can be inferred via the universal biconditional elimination rule. forall y: ~T_2(y) can be inferred via the universal biconditional elimination rule.