I have nothing against common sense, of course. Indeed, common sense might be
claimed to be the first theory anyone uses to solve any problem, or to do anything at all (perhaps after instinct). But if common sense is *all* we need, universities and translator training schools are wasting their time... A first, "common sense" theory of something is where we start, but not necessarily where we end up. (It is not common sense that space is cuverd, is it?)