Problem-Solving is what we do when we aren't involved in Justification--that is, when we're trying to actually resolve the differences in our lives, rather than trying to hide from them. Interesting fun fact: a linear-thinker's approach to problem-solving is seen as justification from a holistic-thinker's point-of-view and vice versa. If that doesn't make sense, substitute "man" for linear and "woman" for holistic and you'll see why we can so easily see into each other's blind spots.