Whichever device, precedent or legislation, is chosen for the communication of standards of behaviour, these, however smoothly they work over the great mass of ordinary cases, will, at some point where their application is in question, prove indeterminate; they will have what has been termed an open texture. So far we have presented this, in the case of legislation, as a general feature of human language; uncertainty at the borderline is the price to be paid for the use of general classifying terms in any form of communication concerning matters of fact. Natural languages like English are when so used irreducibly open textured. It is, however, important to appreciate why, apart from this dependence on language as it actually is, with its characteristics of open texture, we should not cherish, even as an ideal, the conception of a rule so detailed that the question whether it applied or not to a particular case was always settled in advance, and never involved, at the point of actual application, a fresh choice between open alternatives. […]