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: s -> ~T(a_20). forall x_20: T(x_20) and S_20(x_20).
forall x_20: T(x_20) can be inferred via the universal simplification rule. forall x_20: S_20(x_20) can be inferred via the universal simplification rule.