I have other more important rules I need to memorize with those brain cells, that I don't need to voluntarily choose to give myself more problems that require me to memorize ridiculous rules and obscure special edge cases to look out for all the time, that inexplicably screw me if I happen to slip up and forget to apply them. I stopped playing "step on a crack, break your mother's back" years ago, when I was old enough to actually have somewhere I needed to be.