However, Mirror partners are often very good friends. When they work together on the same project, their mutual correction and adjustment becomes a constructive criticism that is usually accepted as useful. The main discomfort in these relations is caused by the difference in Judgement and Perception between the partners. Mirror partners generally agree about setting near future goals, but disagree about global aims. Mirror relations usually lack warm atmosphere between partners. This situation normally changes in presence of a third person who is Dual to one partner and an Activity partner to the other.