I tried figuring out the reference with Gemini, and it said this:

The immediate reply to that comment is: "On the internet, no one knows you're an editor." This is a direct play on the famous 1993 New Yorker cartoon: "On the Internet, nobody knows you're a dog." By setting the anecdote in 1987 (a few years before the World Wide Web was publicly available), the commenter is implying that back in the analog days, if a dog wanted to be a writer or an editor, they couldn't hide behind a screen—they had to sit in a smoky London pub and do business face-to-face.

Which makes a lot of sense actually. I would imagine that's what the replier to you thought you meant.