As we are driven by life experiences and since the experiences of each of us are unique, it is no wonder we come into conflict and confrontation over most everything we can think of. Stories are about the incompatibility of two life experiences as they relate to the best way to resolve an inequity.
If a character stands by his life experience, then it stands to reason his approach served him well in other scenarios. Similarly, his counterpart has had different life experiences that served him equally well. In the context of the current inequity in question, each life experience generates an approach incompatible with the other. In one context, each set of experiences was problem solving. In the current context, one will be seen to be problem solving, the other justification.