What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_2: W_1(y_2) -> R(y_2). forall y_2: R(y_2) -> W_1(y_2). forall y_2: W_1(y_2) or ~R(y_2).
forall y_2: R(y_2) -> W_1(y_2). forall y_2: W_1(y_2) <-> R(y_2). forall y_2: R(y_2) <-> W_1(y_2).