Does Heisenberg’s Uncertainty Principle mean that the universe cannot deterministically be predicted by observers, or does it mean that the universe is inherently indeterministic, meaning that the exact same initial conditions could give different results over time (or is this a wrong interpretation)?
If the second case is true, what should be understood by this indeterminism? Is it that some processes have random or stochastic components? I do not understand how true randomness can exist. Where would randomness come from, apart from imperfect knowledge about the system?
I am not a physicist and am potentially completely misunderstanding many concepts in this question. Any explanation or references are welcome!