So you maintain that anything which follows a few syntactic and semantic laws cannot be gibberish? I disagree; text can have meaning and still be gibberish. Consider a sequence of words drawn uniformly at random from a dictionary, then slotted into a repeating template like (noun) (verb) (article) (adjective) (noun). The template ensures that no rules of syntax are violated. A few constraints on the vocabulary can ensure there are no egregious violations of semantic rules, like green ideas and furious sleeping. Restrict the vocabulary to a few hundred concrete words and you can even ensure that every sentence makes a testable prediction. But it's definitely gibberish.