Just by the way:
I can give an example, when in a discussion about the distribution of biomes i was shown a map.
To check (without knowing seed) i generated any two maps.... and one of them - was exactly the same as i was shown....
A coincidence? I do not think so.
I just want to repeat once again - it doesn't matter how the algorithms work, whether they are a real random or a masked sequence of numbers.... good - this is when her work is not thrown in the eye. And that the player would not pay attention to it. And that the player would not pay attention to it.