[gtr32x]

> (By universe I mean something that follows a defined set of rules.)

I just want to make a mention for this point. Ahh but you see, for all we know, the universe could have simply followed 'a set of rules' up till the point we are living at and until a set future point in the 'timeline' (or something we perceive as the timeline). Then all of a sudden all the laws we know will break because the 'universe' entity decides to play another recording. Then all of knowledge of the 'universe' collapses. I think this is what the parent was talking about. You cannot predict nor even conclude that such scenario cannot happen.

[ars]

In that situation the universe is not following a defined set of rules, it is following an arbitrary set of rules. Even during the initial playback period.