system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why cant you remember exactly when you fell asleep?
gpt
As your brain shuts down certain functions to fall asleep, information stops being processed by your working memory. This, in turn, means that the short term memory stops receiving information and therefore has nothing to pass on to long term memory. In other words, you’re too sleepy to notice when you fall asleep.