this post was submitted on 30 Sep 2025
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A quick reminder, 2025 update should include AI in the diagram (eviltoast.org)
submitted 2 days ago by orhtej2@eviltoast.org to c/programmer_humor@programming.dev
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[–] Knock_Knock_Lemmy_In@lemmy.world 2 points 2 days ago

False.

How do you modify a transaction that occurred 100 blocks ago? You'd have to also modify the 99 other blocks since that modification. But for those new blocks to be valid you need to find the new magic number that brings the hash below a certain threshold, 99 times. But there aren't enough machines.