Kenzie, my point is that yes, there are guides but half of the rules out today have no actual linguistic proof for being incorrect. Today's language is based off of Latin and that is where we get our language rules from. But if you break a double negetive sentence down, there is no linguistic reasoning for it being incorrect. Using linguistic rules, it is perfectly fine. It is society that deems it incorrect.
I mean, tomorrow MLA could state a rule saying that every third letter A you use has to be followed by a letter D and that rule could become standard to Americans just as many other rules have. My point is, there is no linguistic reasoning to many rules, they have just been adopted by society. Nobody seems to ask why. I never did when I learned about grammar.