In the case of a hard fork, the new rules contradict the old ones so much that the nodes that did not accept them do not perceive information from the nodes that accepted them. If we follow the same analogy with languages, the old nodes speak English, and the new ones speak Chinese. The hard fork, according to the cryptocurrency academy , involves changing the consensus mechanism itself, and in this case the entire network is divided into two parts that will never be able to interact again. This is because blocks that are recognized as valid in one part will not be considered valid in the other. In the case of a hard fork, one of the formed branches (chains) of the system may die off, but it may also persist - it depends on how much hash power each of the branches has. A branch with a higher power has a better chance of success.

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