If you disagree with someone sometimes you let them know and have a discussion. This is most honest and clean. Some other times, you keep it to yourself but you act on it in some way other than having a discussion. Yet other times, you keep it to yourself but never act on it. So, the latter is more honest than the former because you are deterring yourself for an opportunity to voice it. Is there any other pathway that leads from disagreement? In the first and third case, disagreement is resolved. Third involves some suffering though. Second is absolutely dishonest. And all of them are perfectly understood.