Augustine describes, we might say, a system of communication; only not everything || not everything, however, that we call language is this system.
     (And this must be said || one must say in ever so many cases where || when the question arises, || :can this description be used or can't it be used? || is this an appropriate description or not?”. The answer is, “Yes, it can be used || is appropriate; but only for this narrowly restricted field, not for everything that you were professing || professed to describe by it.” Think of the theories of the economists.)