It happens all the time. Dave writes something, someone thinks about it and decides he’s missing something, they comment, and Dave takes issue with them not patting him on the back to tell him how smart he is, and a lively debate ensues. The most entertaining feature of these debates is that he’s terrible at it because he refuses to accept that maybe he missed something.
This thread, which was pointed out by a commenter on the last post is as perfect an example as there is.