/sci/ - Science & Math

>>8639824
>the following big bang will produce exactly the same universe down to your current brain chemistry

"Quantum dice rolls" make this extremely unlikely.

Let's say it was possible to travel back in time 100 years. Even if the time-traveler managed to have absolutely no impact on anything (nothing that would cause a "butterfly effect" type scenario), the events of history from that point on could/would still play out differently for them.

The universe could still be a closed system that expands and then collapses, but there's no reason to think everything would happen exactly the same way every time. Quantum weirdness can put a limit on how predictable the universe is.

An example of what I'm attempting to describe:
https://phys.org/news/2012-07-dice-quantum-mechanics-nature-unpredictable.html

>>7622717
Exactly what I mean. There is no other option.
Here's a thought experiment :

Say you can select a point in time and save it. According to determinism, whenever you start from that point in time, everything will play out exactly the same. Even after 9999 years later, everything will follow the same chain reaction to the subatomic level.
According to true randomness, whenever you start from that point in time, everything will be different and the factor of randomness will change everything to incalculateable, non-deterministic possibilities.

What do you think would happen ?

is it possible to know if something is random or not?

So /sci/, a di with 420 sides is rolled 420 times, if you added each outcome together, what is the probability this outcome would equate to 88888?