Unverified50% confidenceFactExact time
Blockchain irreversibility comes from its consensus mechanism design: Bitcoin makes the computational cost of rollback rise exponentially as the number of confirmations increases; after Ethereum's Merge shifted to proof of stake, a finality mechanism ensures that confirmed blocks cannot be easily reorganized.
1
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50%
Confidence
Long-term
Relevance
10/13/2026
First Seen
Sources
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