Case study for a Monday morning:
You're a bright young guy. Been to one of those premier institutions with numerous "I"s in the acronyms they are known by. Graduated thinking hey, I'm bright, I have this degree from this premier place, I'm not just the whiskers on the cat, but the whole cat's face and possibly the paws too.
Naturally, like so many of us do, you think you have all the answers to the world's problems. You believe implicitly that nobody could possibly disagree with your answers, nor find fault with your impeccable logic. It's obvious to you, has to be obvious to all.
So you start putting those answers out for public consumption.
Then you find, like so many of us also do, that there are indeed people who disagree, who don't quite see your impeccable logic with the clarity you do. It puts those first niggling doubts in your mind. But oh no, you can't admit to them for public consumption, because one of the lessons you think you imbibed from that premier establishment is never to admit to doubts.
(Of course, you didn't learn the most important lesson of all: the brightest guys welcome and learn from doubt. In fact, that's why they are the brightest).
So: faced with the troglodytes who put out other answers for public consumption, who won't see and applaud your logic, what do you do?
Textbook-case easy: you make snide remarks about their anatomy.
(Of course, you didn't learn that other important lesson: remarks about the other guy's anatomy don't undermine the other guy's arguments, they only undermine yours).
Textbook-case in point: this.