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1			Philosophers, psychologists, and scientists think about and studying dreams and dreaming for thousands of years. Although, they have yet been able to agree on one of most basic questions about dreams—whether or not they have meaningful. One of the first tried to answer this question was Aristotle, wrote On Dreams in 350 B.C. In this essay, he said that although dreams may sometimes cause actions by influence the dreamer, they are not predicting the future. Closer to our own time, Freud the founder of psychoanalysis firmly believed that dreams had the meaning. According Freud, dreams are a collection of our unfulfillment wishes. Carl Jung, a contemporary of Freuds, also believed that dreams were meaningful. However, he doesn't think that dreams are always about our unfulfilled desires. He further believed that people should try to interpreting their dreams. Edgar Cayce had another theory about dreams. He felt that dreams helped for people resolve real-life problems. Three more recent psychologists who believed that dreams were not meaning were Evans, Crick, and Murchison. Evans felt that dreams were a by-product of the brain's effort to categorize information gained during waking hours. Crick and Murchison believed that dreams helped the brain rid it of unnecessary memories, so that it can work more efficiently.