That’s a pretty broad answer. Care to elaborate?
If I were to gather 200 of my fellow statesmen in my yard and have a vote of secession, and we voted 200-0 to secede, would that mean my secession was proven to the Congress of the United States? Hell no. That's what the south did. That's the purpose of Article 4, to allow Congress to provide the manner in which a state is to prove its acts. Having a rabble-rousing rally is not a provable act of a state.