(March 17, 2014 at 9:46 am)Pickup_shonuff Wrote: I suppose this level of randomness would be something on the quantum level but sure, we could never really measure it.Well, how do you measure temporal randomness? You can't. At best, you can make a very dangerous assumption: any particle at any time cannot have certain predictions made about it, or certain combinations of measurements made of it.
Therefore, if you imagine yourself traveling back in time before some past event, you can imagine the unpredictability of that event (even though it's set in stone now, having already passed). However, it's really non sequitur to then say that things could have turned out differently: there's no way, ever, under any circumstances, that we will get to replay a measurement of the same particle at the same space AND TIME, and see if it would have "rolled" a different outcome.
