" In his great book How to Do Things with Words (1962), J.L. Austin considers the apparently simple sentence "France is hexagonal." He asks if this is true or false, a question that makes perfect sense if the job of a sentence is to be faithful to the world. His answer is that it depends. If you are a general contemplating a coming battle, saying that France is hexagonal might help you assess various military options of defense and attack; it would be a good sentence. But if you are a geographer charged with the task of mapping France's contours, saying that France is hexagonal might cost you your union card; a greater degree of detail and fineness of scale is required of mapmakers. "France is hexagonal," Austin explains, is true "for certain intents and purposes" and false or inadequate or even nonsensical for others. It is, he says, a matter of the "dimension of assessment" -- that is, a matter of what is the "right or proper thing to say as opposed to a wrong thing in these circumstances, to this audience, for these purposes and with these intentions. "

― Stanley Fish , How to Write a Sentence: And How to Read One