What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? U(g) -> r. forall x: Q_3(x) <-> U(x). r -> Q_3(g).
U(g) -> Q_3(g). forall x: Q_3(x) -> U(x). forall x: U(x) -> Q_3(x).