system
A chat on subreddit /r/me_irl
human
If that 13in dick person must be dead. Otherwise you think he would have collected the prize money for the search for a dick over 10in. So far all the people who  claimed to have over 10 and tried turned out to be 9.5-9.75.
gpt
Jonah Falcon.  
But, take that with a grain a salt. I don't think there's any picture evidence.