There is no universal answer that would completely explain the phenomenon of dreaming. According to one of the theories, dreams are the reflections of our recent experiences, mixed and intertwined by the brain; the theory claims that dreams occur during the process of converting short-term memories (such as daily experiences) into long-term memories. Some psychoanalysis schools believe dreams to be reflecting subconcious motives, thoughts, and desires people have. Analyzing dreams is a commonly used method in psychoanalysis. There is also an approach stating that dreams serve no particular purpose, and that they are just a byproduct of the brain trying to have a rest and "cool down."