Book, Nook, Look
Social media can be a lot like the wild west, especially when it comes to fact-checking. The internet’s fact-checkers are always on the prowl looking for their next victim. You have to be sure that what you say is correct, or else; you get fact-checked. People are always waiting around to correct other people on social media. It’s like a hobby.
This person thought they had stumbled on something in the English language they thought no one knew. We’re sure they were very excited to come on the internet to share this tidbit they had thought of. It was not well received, and did not go as they expected. A quick trip to Google would have saved this person quite a bit of embarrassment.