Language evolves. What’s correct today may not be correct tomorrow, and what’s bad form today may become so common that it becomes standard. Words often have multiple definitions, some based purely on usage. Ain’t is in the dictionary (though still listed as nonstandard), and so is funner. The latter is so common it will probably become standard. New words are being invented every year—you’re reading this on a blog, possibly on a netbook. Have you tweeted about this site yet?

What’s more, there are some grammar rules that require interpretation; you need to look at the intent, the spirit—not the literal rule. This is true for subject-verb agreement, for instance. From The Elephants of Style: “one of those people who write…” is correct. Even though “one writes,” the sentence is┬átalking about the “people who write.” Other times you simply have to trust your ear.

The point is that some strips may say that a common definition is wrong, or may promote a certain usage of a word or phrase. Generally it refers to the suggested usage by most grammarians at the time, but there’s no single authority. If you feel that it’s okay to use a word in the way I’m criticizing, you’re probably right—but it may be better to avoid it. Feel free to have these discussions in the comments, but don’t be a hater or I’ll unfriend you.

(Referring to the ‘s rule)
Style rules of this sort are, of course, somewhat a matter of individual preference, and even the established rules of grammar are open to challenge. Professor Strunk, although one of the most inflexible and choosy of men, was quick to acknowledge the fallacy of inflexibility and the danger of doctrine.
— E.B. White, The Elements of Style