As I understood it, the paradox was that by the rules of the thread, "This comment will be massively upvoted. 100%" is something I should upvote if I believe it's unlikely to be true. But if I upvote it on that basis, I should expect others to upvote it as well. But if I expect others to upvote it, then I should expect it to be upvoted, and therefore I should consider it likely to be true. But if I consider it likely to be true, then by the rules of the thread, I should downvote it. But if I downvote on that basis, I should expect others to downvote it as well, and therefore I should consider it unlikely to be true. But...