one of the first things that comes to my mind for DA practical application is debate. Playing devil's advocate, being able to follow the consistency of two lines of opposing thought at the same time without being married to either one of them. It's excellent for testing the strength of an argument. The reason "if then else" applies to the balancing of opposites present in DA is because it's conditional, meaning both sets of opp. could be true IF one or another condition was met. So, if A then B, else C.