You mind feels fuzzy for a moment, and you realize you've forgotten something. Looking down at the book, you notice what you've written about clothes. "What the hell are clothes?" you wonder out loud. You realize that's probably what you forgot.
It kind of horrifies you that you made yourself forget something like that. You try hard, but can't remember what in the word they are. "Maybe if I erase it..." you say to your self. You turn your pencil over and erase it.
Nothing happens.
"Well, I guess I should just write what it was back into existence..." You trail off. Wait, what was it again you had nullified in the first place? You think hard, but you can't even remember the word! Ah well, it's probably not important.