>>police<<

Smile

But I'm serious. Descriptivists, for example, may observe uses or 'gramars' that are not captured by the categories of prescriptivist grammar(s) which are themselves also based, in part at least, on observation. To some extent, the prescriptivists only convert observed into a rule. At the same time, descriptivists convert 'liberty' to a rule. Related is the approach to use in legal writing. It does more than pretend to accuracy, but also strategically subverts meaning.

Edit: I guess this is true of a lot of discourse. An ancillary question, then, is what distinguishes the subversive behaviors of legal speech and writing from those of other forms of discourse.