Dreams are often thought to be real because dreams are the reactions of our brains during sleep and have similar characteristics to our real-life experiences. The scenes and experiences in dreams are usually what we experience in our daily lives, such as emotions, experiences, interpersonal relationships, etc. Therefore, dreams can be seen as an expression of our innermost feelings and experiences. However, the authenticity of the dream was also controversial. Some people think that the experiences and scenes in dreams can be regarded as a subconscious expression and have nothing to do with our real life. Others believe that dreams can be seen as a psychological phenomenon related to brain activity and may not be completely real experiences. In general, the authenticity of dreams was a controversial issue. Different people had different opinions.