It's a thought experiment, of course. There cannot be any evidence one way or the other, by definition. Any potential evidence is rolled back, too. But then, wh

It's a thought experiment, of course. There cannot be any evidence one way or the other, by definition. Any potential evidence is rolled back, too. But then, why are we so sure our current beliefs WRT the arrow ot time are true? Though there's no hard evidence, but if you think, for example, about the efficiency of evolution - it would be much easier to explain if we assume that the unlimited number of iterations is performed. (This is not the only possible explanation, of course- but this one is overlooked IMO) I would say that compared with the strange ideas like "multiverse", this one is rather benign :-)