Abstract
A challenge for dealing with controversies as intractable as the Israeli–Palestinian conflict is how to measure the influence intangible factors have on the conflict, which may even have more influence over the outcome than the tangible factors. Because the importance of such factors changes from one problem to another, and because intangible factors do not have known measurement scales, what is needed are relative scales, which in turn yield relative priorities, developed for each problem within the context of its own diversity of factors, and their influences on the actors involved and the concessions that they exchange.