Sometimes when one repeats a word over and over, like carrot, the word starts to make less and less sense. If one writes the word down over and over, the spelling starts to make even less sense. One starts to ask, “Is that even a word? It doesn’t look right. It doesn’t make sense.”
Although they might have said or spelled carrot a million times, it’s the repetition that can sometimes cause doubt to the validity of the word.
That is how I feel about my book proposal.