Comment by peteforde

That is a common blockchain myth.

There were solutions before blockchain, especially in the field of Byzantine fault tolerance. The original Byzantine Generals paper was from 1982, and practical algorithms existed before Bitcoin. For example: PBFT - Practical Byzantine Fault Tolerance - published in 1999.

https://css.csail.mit.edu/6.824/2014/papers/castro-practical...

Blockchain solved a different version of the problem: how can a large, open, permissionless network reach agreement when anyone can join and nobody has a fixed identity?

Classic BFT is like a committee of known people voting, where the system survives some liars.

Blockchain is like letting strangers on the internet vote, but making votes costly enough that cheating becomes economically difficult.

> The lack of CS knowledge on this board is pretty staggering sometimes.

Right!?