Is "what is this ?" even a productive comment in itself? That's the point the parent is trying to make. If you click on this link, and you can't tell what it is, you probably don't care what it is. And after that, if you don't care enough to search "Daffy Duck" on Google or whatever, you really don't care what it is. Why would we possibly need a Hacker News comment explaining what Warner Brothers cartoons are?

Again another non productive comment. Commenter didn't know what the companion meant. That's all he/she was asking. Why is that hard?