system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can my sleeping brain create a wildly imaginative dream with intricate detail, but my waking brain struggles to come up with a creative premise upon which to write a story?
gpt
The part of the brain that creates common sense is part of the brain that slows it's function when you sleep. Your brain is no longer trying to think rationally and is going through your memories. Occasionally, usually near the end of your sleep, these random senseless strolls through memory lane is remembered and the mind starts trying to make sense of it all and what you get is your standard dream. You dream at other times at night but your mind is too asleep to remember it or make sense of it.