I think this article is focused on "multiplayer" in the contemporary non-game sense (which I still find weird). However, I think an interesting thought experim

I think this article is focused on "multiplayer" in the contemporary non-game sense (which I still find weird). However, I think an interesting thought experiment is a system that DOES share that secret state between players in a way where some facts are verifiable, but others are not. For example, when playing cards, I have the state of your hand in such a way that I can verify the card you played is valid, but cannot reasonably see (or find out) your hand.