1.) In a closed system, the properties of the system can be observed, but are un-caused.
2.) In a closed system, the 2nd Law of SirMoDynamics works, but only there.
3.) In a closed system, there's no subsystem, which is closed, therefor, there's a number of systems, which are not closed and temporarily suspend the 2nd Law of SirMoDynamics IF THE SYSTEM WERE CLOSED (see 2).
4.) In a closed system, there's no place for (a) God(s).
If a system has properties, there must exist subsystems, which have properties as well, which are not caused by former events. Such an un-caused system of properties can be observed in Nature and is called: radioactivity.
It is "in the nature" of an unstable system to "give away" energy. Nothing causes radioactive particles to give away its energy; it is their "natural" property.
But then again, I'm not William Lane Craig, which means, that I can think beyond the scientific miracles of the Bible and the Quran, which only rarely deal with quantum physics, me thinks.
A closed system, which is infinitely dense and a closed system, which is infinitely sparse cannot exist at the same time, for they would create an equilibrium. -1 and +1, two sides of an "extreme" are never reached, because they would create literally Nothing.
Since there is something, instead of Nothing, neither an infinitely dense, nor an infinitely sparse system could've ever existed simultaneously, but in order for Nothing to exist, they'd have had to. The nothing is represented as the paradoxical value of +/- 0.
This has never happened before, otherwise, there'd always & never not have been Nothing, therefor it'd have taken infinitely long for Nothing to turn into Everything (Nothing and Everything are just "both sides of Zero").
Since there is Something, said equilibrium was never reached.
Now the question is, "what is Something?".
Something is the NATURAL PROPERTY of a system to resist the phase cancellation in a system of "mirror symmetry". If you take (for example) a piece of music and mix it with the same piece of music, while reversing the phase, you are basically taking +1 and "adding" -1 to it............you are left with Nothing = silence.
Therefor, the Universe can only have had a beginning, if it already had an end.
That's the quantum world. Now that would be determinism. +1 + -1 = The Beginning & The End at the same time = Nothing.
So what we've learned here is, that we cannot learn anything about Nothing, other, that it cannot exist, for there would always be nothing.
Now, what if said values of +1 and -1 SLIGHTLY fluctuate? Well, then there is no phase cancellation and you are left with the NOISE of the system.
And that's, ladies and gentiles, the background radiation.
So what I'm trying to say is, that our Universe can be the only one, but wasn't and won't be the only one, ever, for it would've never been in the first place. Yes, we cannot understand that, but quantum particles do.
Therefore, the Universe is not deterministic.
It began, when it ended and will always be the same through change.
Or as the famous Master Eckhart once said, after inventing quantum mechanics in the 13th century:
"God has created a room, he himself cannot enter: it is the room, where he keeps Nothing".
Topic: The Kalam Argument