Can people really "selectively forget"?

"Selective forgetting" is a psychological phenomenon, which means that in the process of memory, some events are forgotten and some are kept. "Selective forgetting" is a psychological defense mechanism, a psychological protection and a way of psychological self-protection. In life, people tend to forget selectively. For example, when some important events happen, people will selectively forget some unpleasant things and remember some beautiful things. When we encounter some unbearable pressure, we will also choose to forget some painful experiences and keep those good memories. These are all human psychological defense mechanisms. Selective forgetting is not a mental illness, but a psychological defense mechanism and a way for people to protect themselves psychologically.