Group 1 - The core idea is that handling disagreements effectively determines one's level of maturity and relationship quality [1][32] - Disagreements are normal and should not be viewed as threats but as opportunities to understand others better [10][11] - Emotional expression should focus on sharing feelings and needs rather than attacking others [16][17] Group 2 - It is essential to separate the person from the problem to avoid personal attacks during disagreements [18][20] - Focusing on interests rather than positions can lead to better solutions and avoid zero-sum thinking [22][26] - The approach of "A+B=C" encourages collaborative thinking to find mutually satisfying solutions instead of a win-lose scenario [29][32]