I while ago I was listening to an interview involving the IMF‘s economic policies in Argentina. One of the people being interviewed (I don’t remember the name unfortunately) offered a definition of fundamentalists that I thought was insightful. The below is only a paraphrase as it has been several weeks since I heard the interview.

Fundamentalist: A person who believes in a set of rules or ideas so strongly that even after powerful evidence that these rules are failing the person thinks that the only problem is that the rules are not being enforced strongly enough.