OK, I am creating this thread mainly down to a debate I have started having (elsewhere) with Kedaman.

Is there such a thing as randomness (in the strictest sense)? If we knew enough about any given system, would we always find the underlying rules that govern it's behaviour or are somethings (like quantum mechanics) irreducably random?

I think this question is also equivilant to: Is the universe fundamentally deterministic or probabalistic?