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Q86 / 100
What does "finality" mean differently in Proof of Work chains like Bitcoin versus chains with explicit finality gadgets (e.g., Ethereum's Casper FFG)?
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Incorrect.
The correct answer is A) In PoW, finality is probabilistic — deeper blocks are exponentially less likely to be reverted; finality gadgets provide explicit checkpoints after which blocks are considered economically irreversible
A
Correct Answer
In PoW, finality is probabilistic — deeper blocks are exponentially less likely to be reverted; finality gadgets provide explicit checkpoints after which blocks are considered economically irreversible
Explanation
Probabilistic finality (PoW) means confidence increases with confirmations but never reaches absolute certainty; explicit finality mechanisms periodically "checkpoint" blocks, after which reverting would require validators to lose a large portion of stake (slashing).
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