system
Given the following post, respond as if you're commenting on Reddit:
human
If a 9 hours sleeper sleeps 7 hours a night, are the effect the same as when a 8 hour sleeper gets 6 hours?
gpt
When it comes to sleep, "we don't really know" is usually the best answer.

It was only recently that it was discovered that our bodies clean the fluid around our brain during sleep. This may or may not be the primary reason for sleep.

In terms of time, we don't really know. Because we don't know what drives sleep we can't control the variables. Without controlling those variables an experiment of two identical 9 hour sleepers, having them sleep 7 hours, the result between the two would likely be different.