I think you are missing the point, knowing is not about conviction but facts. OP put emphasis in it, he not just think he knew. If you say you know something it

I think you are missing the point, knowing is not about conviction but facts. OP put emphasis in it, he not just think he knew. If you say you know something it is expected that you have reasonable arguments and evidence to back them up. It is fine if you are wrong but if you do it without anything to show then you are just bullshitting.