Let's be honest, though. Do you think Itachi fought everyone in NV? He knows that no one has been able to break out of Tsukiyomi based on his experience in fights. He killed his entire family when he was young, so no one from previous generations could have told him about their experiences in battles. And unless the Uchiha tablet says no one can break the Tsukiyomi--and you don't have proof it does, and the tablet itself isn't omnipotent--then there's no way to definitevely say that Tsukiyomi cannot be broken.
You have to use common sense, something you seem to be lacking. It's really crazy how you think anything Itachi says is absolute and total fact. Anyone who does think that are obviously fanboys of Itachi.