In human science there is a lot of disagreement, because human can understand each other behavior more through sense perception and emotion than by scientific evidence. This lack of hard proves easy lead to an argument. From my experience people will start to know each other more and more when they are disagreeing with each other because it is our human nature to control ourselves and present the information in the best possible way. If that isn’t their real behavior, the real behavior will be revealed when they are face with strong rapid change of emotion from arguing with other people. On the other hand in some situation arguing with other people will not lead to knowing each other more but lead into destruction of friendship.Disagreement in both human science and natural science can aid the pursuit of knowledge like in the way like Einstein and Bohr arguing to discovered quantum mechanics through the argument between themselves and how historian discover the meaning and the purpose of history by learning about disagreement which led to war between country. However this knowledge that came from disagreement may be not the real truth for everything because ‘my truth’ and ‘your truth’ are not same, like each scientists and historians view thing in different point of view. So everyone must freely look at both sides. Disagreement can help the pursuit the knowledge if we have the reason and right emotions to be open minded enough to listen to other people ideas and accepts the fact that they also can be saying the ‘truth’ from another perception.