Not really... there are some out there (and maybe here) that suppose that their view or definition is absolute... I also disagree about the rules. They may be "absolute" but it depends how you apply them. I don't play MTGO, but does it let you back up or take plays back? I know IRL, in friendly or casual games, we allow a little leeway in playing - take back a creature spell or if an upkeep is optional and a player misses it, let him go back and do the upkeep thing. Only a certain number of times, mind you, but the flexibility is there.