system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do we forget most or sometimes all of what we dreamed about shortly after we wake up?
gpt
When you sleep a lot of the functions of the brain is turned off and not working. One of these functions is the ability to form new memories. Your brain is only able to keep about three seconds worth of memory at once without this function as these are thoughts that are actively being worked on. Even when you wake up and you are able to form new memories again your mind is able to recognize the thoughts as just dreems and will discard them as unimportant.