system
A chat on subreddit /r/PoliticalCompassMemes
human
To be fair, snopes and other fact checking sites haven't yet actually concluded if its fake. 

Snopes also referenced this particular post, which I found funny.
gpt
To be even more fair, the tweet doesn’t exist now and it’s virtually impossible to prove a negative. At a minimum, the hundreds of comments reacting to this as if it were real are just feeding our partisan bulls hit. This is Trump/Russia on much smaller scale.