When we say something, we should be fully convinced that we are saying the right thing. Otherwise, we would have to apologize just for saying it in the first place.
Every once in a while, however, we may say something and we get corrected for it. Many people will do this online, and it seems as if they find it much easier to cut someone down when they say something wrong.
There are also times when people are so convinced they are right but they are fully wrong. When they are shut down for what they say, it makes us laugh. Here are some good examples.