system
Given the following post, respond as if you're commenting on Reddit:
human
Why are we so tired?

Almost everyone consumes some sort of stimulant (caffeine, coca, etc.) to be less tired but, why? Why are humans so tired? Do we sleep less than we should? Are our lives too active? Were the cavemen equally tired? Is it normal for an animal to be tired?
gpt
There is FAR too much layman speculation in this thread. 

Please, if you're proposing some ***idea*** about what a better sleep system is, or why we don't get enough sleep, we ***need*** to see some data to support that theory.