You've added a restriction that it must be changeable by an individual.
You mean that you didn't read my question the first time right, asking if you can change it, obviously a master group of hackers with unlimited resources can change it, but it's of no consequence just as it's of no consequence that a consensus can happen and data can be removed.
The probability of it happening has no bearing on whether it is immutable. The ability to change it is baked into it's design. Just like ethereum is not immutable they changed the blockchain.
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It's not the probability, its the fact that not one user has such ability, not ned, not smooth. We are going around in circles, you cannot appreciate the paradox and I won't compromise and call it anything other than immutable regardless of how many times it's pointed out that it can be changed.
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