I 100% agree that the reputation system will be they key to scaling this. I'm currently seeing promise with my experiments with reputation scoring.

As for "How do you create a platform that allows correct ideas to flourish even when they go against conventional wisdom?" Great question, however my goal here is a bit more modest, it's to create a platform that allows facts which are provable by public primary sources to stand out from everything else. I think a platform that focuses on simply that can add a lot of value to political discourse.