Using Wikipedia as a reference source of fact. There is no accountability for the information written and it is ever changing.
Using the words: everyone, no one, always and never.
The Blame game. Something that happened before I was born or on the other side of the world is something out of my control (out of anyone’s control).
People who pass themselves off as experts – when they did nothing but read a book. (Often a book written by someone claiming to be an expert because they read a book….)