Revan was cunning but naive,you're a sith and you're not expecting your apprentice to betray you? Come on thats just dumb, Sidious for the most part kept that in mind,until Vader tossed him over. But seriously if we're talking sith,Sidious is stronger its canon get over it. If ur talking ls revan well theres no way to prove that and that be mere opinion. Canon is canon whether we like it or not and its whats gonna stand unless some future change comes.Just like the gender issues that have arisen,canon is canon.