Onur Cobanli explains:
This is indeed scientifically proven to be so; when you dream you reflect about what you experienced in a day as well as what you did not experience; what you did not experience are alternate possibilities; it is the way your brain trains itself and makes it ready for the next day; when you dream you explore possibilities; and when we think this for life in general, we could conclude that dreamers; people who invent and experiment new things are essential to our progress and continued existence.