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The inclusion list design of FOCIL is like issuing a number for the transaction first, to prevent it from being endlessly jumped ahead.
Censorship-resistant BFT, when more than 20% of validators act maliciously, has an optimal delay of at least 5 rounds; traditional BFT only requires 3 rounds.
To prevent censorship, schemes like Ethereum's FOCIL/EIP-7805, Solana's Constellation/MCP propose that validators collect inclusion lists before the formal proposal, and then broadcast and confirm an additional two rounds before reaching consensus.
Five rounds are the theoretical lower bound; achieving both simultaneously in four rounds is difficult.
While censorship resistance increases delay, it can significantly improve the predictability of actual confirmation, preventing transactions from being indefinitely delayed.