The third type of fool is a stubborn fool. This is the person who knows what thye should do, they refuse to do it, and they are stubborn about it. God equates a stubborn fool to the kind of person who is like a dog who eats his own vomit. This is the kind of person who actually is beginning to take pleasure in evil. As we follow the path of foolishness we now can see how a person is increasing in pride and sinful behavior. In this teaching Dan gives some very pratical examples and also the sever actions that are required to correct this type of foolishness. It should give us pause when we see that this is the largest type of foolishness that God addresses in Proverbs.