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_4: P_2(y_4) <-> T(y_4). ~T(a_11).
forall y_4: P_2(y_4) -> T(y_4) can be inferred via the universal biconditional elimination rule. forall y_4: T(y_4) -> P_2(y_4) can be inferred via the universal biconditional elimination rule.