Thank you for pointing out, this place is indeed a typo, what I want to say here is: because in our implementation, the split operation of a raft group is treated as a special raft log, because raft is a quourum-based algorithm, so in the case of network isolation, there may be followers that cannot receive the split command. I added a practical example after the paragraph. The solution to this problem is written behind, using the epoch + logic clock to ensure that the system is able to confirm the newest leader for specific raft group at any time.