How Do ‘Byzantine Fault Tolerance’ (BFT) Consensus Mechanisms Offer Stronger Finality?

BFT mechanisms, common in PoS systems, achieve absolute finality because they require a supermajority (often two-thirds) of honest validators to explicitly agree on the block order. Once a block is finalized, it is mathematically impossible to revert without slashing the stake of the two-thirds majority, making reversal economically prohibitive and offering a stronger, deterministic form of finality than PoW's probabilistic finality.