A poor understanding of causality has deadlocked the discussion of a couple of video-game geeks, and so we have ventured on into the internets looking for a bit of professional help. Hope we can borow a couple moments of your brain time. (Please remember that this isn't really physics question, its a fantasy world, and theres magic at work, were looking at thing from the logical/philisophical side) Here's the deal: A person begins a process that will cause Time itself to "rewind" backwards through 3 day period, stopping at the begining of the the first day. As the rewind progresses, the events that would have been the "future" are lost, it is as if they had never existed in the first place. A problem here is that one of the first events to be lost in this way is the process that caused the rewinding in the first place. Without the cause, the rewinding (effect) would, we assume, be illogical. Apparently, we have a paradox. To further complicate things, the process that begun the rewinding is, in fact, a prayer. The rewinding itself is the action of a Goddess. Does her define nature allow her to contnue with her effect, even after the cause has been made as to never exist in the first place? One side says no, that the cause-and-effect relationship binds all events in the physical world, and that the entire concept of rewinding is incorrect. The otherside disagrees, saying the Goddess is outside the bounds of time, and needs not abide by its rules. Is there any ay out of this? Oh, and first one to guess which game we're talking about gets 3 cookies and a spring roll.