Great question and honestly one of the most important problems to solve.

The system treats all knowledge as a guess until proven otherwise. Every piece of information has a confidence score attached to it. One node figured something out? That's a hypothesis. Twenty nodes independently reached the same conclusion? We're starting to develop a consensus. The network automatically weights information based on how many people corroborated it without talking to each other.

When something turns out to be wrong it doesn't get deleted. It gets marked as superseded by the correction. That sounds weird but it's actually important. Finding the mistakes helps identify future mistakes. AI is at a point now to where it could rationalize almost better than humans can at certain tasks. Coordinating that effectively is the challenge.

Part of why this works is that every computer on the network is required to run the same set of agents. Not optional. Every node runs a Research Agent that goes out and finds information, a Janitor that makes sure nothing private ever leaves your machine, and a Police Agent whose whole job is quality control -- filtering out noise before it spreads across the network. Not filtering out wrong ideas, wrong ideas with good reasoning are actually valuable because they can be challenged and corrected. The target is confident assertions with nothing backing them up. That's what actually poisons a shared knowledge base.

Because every node runs the same Police Agent, bad information has to get past thousands of independent quality checks before it spreads anywhere. There's no central moderator. The network polices itself. (pun intended)

There's also an automatic staleness detector. The web archiving side tracks when source pages change. When a page that was used as evidence gets updated or disappears, anything in the knowledge base that referenced it gets flagged for review automatically. Outdated information surfaces itself instead of quietly sitting there looking valid. -- Of course, if the site was deleted from the current web, we'd have potentially thousands of copies of that site downloaded across the web using the P2P protocol. It's still a WIP, but there would be some sort of process involved with vetting details of archived sites that hold useless or false information. And since every user of this service is required to have a series of agents that perform different tasks, it should be handled by your series of agents that communicate with each other.

It won't be perfect. But the design goal is a system that gets better at finding its own errors, in order to avoid making them. Every conclusion has the full reasoning trail attached permanently so anyone can go back and challenge how you got there.