Non-determinism requires some kind of RNG which is truly random (TRNG), right? So the next value can't be calculated from the previous one. This means all value

Non-determinism requires some kind of RNG which is truly random (TRNG), right? So the next value can't be calculated from the previous one. This means all values of truly random RNG just exist as we don't need to iterate all of them in order to calculate what's next? So truly random RNG is just pre-determined instantly from step one and RRNG is as pre-determined as TRNG?