A good rule of thumb when having a conversation is to avoid speaking about things you know little or nothing about and instead listen to those who do. It keeps you from looking foolish, and it also helps you learn.

Apparently, Politico‘s National Investigative Correspondent, Heidi Przybyla, didn’t get the memo. She provided a case study of how not to talk about things you don’t know about during an appearance on MSNBC‘s All In with Chris Hayes on Thursday.