What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: P_3(y) <-> R(y). forall y: R(y). forall y: T_2(y).
forall y: R(y) and T_2(y). forall y: T_2(y) and R(y). forall y: P_3(y) -> R(y). forall y: R(y) -> P_3(y).