In a good man is hard to find what is an example of situational irony
Author Flannery O'Connor
Situational irony in "A Good Man is Hard to Find" can be seen where Bailey's mother is caused by an evil man (The Misfit) to realize that she is a sinner. Situational irony is the opposite of what we as readers expect in a story. Read http://www.cummingsstudyguides.net/Guides3/AGoodMan.html#Irony.