Did that headline stop you? Of course grammar is full of rules, isn’t it? Your seventh-grade English teacher tried her best to drum all those rules into your head. You remember all that red ink on your brilliant essays.
Hate to burst your bubble, but there is no set of definitive grammar rules. When Moses lugged those tablets back down the mountain, he didn’t carry a copy of the Chicago Manual or the AP Stylebook with him. I wish that had been the case, because it would have been a lot easier on those of us who write for a living.