Well, trustless trust is exactly the point of blockchain technology. If you can trust your participants anyway you don't need a blockchain. On the other hand,

Well, trustless trust is exactly the point of blockchain technology. If you can trust your participants anyway you don't need a blockchain. On the other hand, neurons aren't ideal nodes that never act fraudulently. There's plenty of false information or misfiring neurons in the brain. The brain is very good at error correction and heuristics, however. So, 'fraudulent' nodes aren't necessarily a problem.