I like Nolan's comments on self validation but make only one observation. I would never try to proof my own writing if it was something of importance because I fear I might see or hear or feel what I think I said rather than what is there. I think the same does not hold true for something I scan since it's not my writing. I'm scanning it because I want to read it, and it is not material I'm already familiar with but want to learn more about.