What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: R(y). exists y: S_3(y) <-> Q_3(y). forall y: S_3(y).
forall y: R(y) and S_3(y). forall y: S_3(y) and R(y). exists y: S_3(y) -> Q_3(y). exists y: Q_3(y) -> S_3(y).