>>13201595there is no such thing as a particular system either.
Its all exclusion of information, randomness is only an abstract concept used to compensate for lack of information.
If you are to define an enclosed system you have not created something magically free from external causation you have simply decided to ignore all previous causes and start with a series of motions.
Randomness only exists with lack of knowledge, and things like probability and chance are simply methods to approximate average outcomes, every outcome was determined when the universe first started, perhaps even before.