Once a person has built a complete explanatory system based on incorrect information, it becomes very difficult to deny it: experiments have found that if you first feed subjects false statements like "eating porridge nourishes the stomach" and ask them to explain the reasons, and then later inform them of the opposite facts, most people will still stick to their original views. This phenomenon is known in psychology as belief perseverance and is closely related to confirmation bias. The core reason is not only that people derive some psychological benefit from their old beliefs, but also that once they personally construct reasons for their conclusions, these explanations exist independently, and even if the original information is overturned, they do not automatically disappear; at the same time, the brain tends to maintain cognitive consistency, and when new information challenges the existing structure, it triggers cognitive dissonance, causing people to instinctively resist correction. Moreover, the psychological costs of prior investments, as well as subtle benefits like a sense of security and belonging, also reinforce this persistence. Therefore, when faced with contrary evidence, people are often unwilling to change their views, not because they cannot see the facts, but because unconsciously they prioritize protecting the already established cognitive framework.