What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: w. forall x_13: U(x_13) and S_13(x_13).
forall x_13: U(x_13) can be inferred via the universal simplification rule. forall x_13: S_13(x_13) can be inferred via the universal simplification rule.