system
A chat on subreddit /r/NoStupidQuestions
human
I had to reread your comment multiple times to notice the different words sock and shock.

Edit: Hard to Google though, all the results go to the better known shock syndrome.
gpt
I used to skate several times a day about 10 years after the toxic shock scare first hit the news, so I took it as a really funny play on words! I knew some hockey players that had trouble with Toxic Sock! Us figure skaters usually skated in tights... I was laughing with OP in a good way!