system
A chat on subreddit /r/me_irl
human
Except you have absolutely no idea of knowing whether it's the right snail or you've just been conned and paid $1m for a decoy snail. 

The only way to find out is to risk a terrible death.
gpt
A gun. A hammer. A crossbow. A bow. A potato. These are just a few of the things you can slam into the snail to see if it dies. If it breaks the hammer it is.... THE ONE!