Core Viewpoint - The article discusses the limitations of human cognition and the resistance to accepting new ideas or perspectives, highlighting how individuals often cling to their beliefs despite evidence to the contrary [4][27][41]. Group 1 - The concept of "thought steel stamp" from the novel "The Three-Body Problem" illustrates how individuals can develop a narrow and biased understanding of reality [4][5]. - The article provides examples of individuals who refuse to accept logical explanations or evidence, demonstrating a lack of cognitive flexibility [8][12][19]. - It emphasizes that people with limited knowledge often exhibit unwarranted confidence in their views, leading to a disconnect in communication [31][32][39]. Group 2 - The article highlights the story of a manager who dismisses constructive feedback and refuses to analyze negative customer reviews, showcasing the challenges of working with individuals who have a fixed mindset [29][30]. - It discusses the consequences of stubbornness, as seen in the example of a relative who failed to adapt to new business trends and ultimately had to close their store [35][38]. - The piece concludes with the notion that personal growth comes from acknowledging one's cognitive limitations and being open to continuous learning [45][46].