What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? r or W(a_10). r <-> T(a_10). forall y: W(y) <-> T(y).
R_1(a_10) -> r. r -> T(a_10). T(a_10) -> r. forall y: W(y) -> T(y). forall y: T(y) -> W(y).