What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y_1: W(y_1) <-> U_3(y_1). forall y_1: U_3(y_1) -> R_2(y_1).
forall y_1: W(y_1) -> U_3(y_1). forall y_1: U_3(y_1) -> W(y_1).