Without this grammar we are condemned to a series of idiolects. To not use grammar (whether a formal grammar or a colloquial grammar) is to risk intelligibility and comprehension in quite fundamental ways, and it is this that makes a grammar a formal system. Hypertext (and classical cinema) may have commonly accepted styles but these are not grammars in the sense of langue. They do not constitute the possibility of utterance in advance, as is the case in our usual experience of language.
Adrian Miles: Hypertext syntagmas: cinematic narration with links
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