One of the great new features of KSX is the rule script schematic view. In the rule editor view, it is one of the 3 tabs at the top of the main window. The schematic view diagrams a rule and lets you see each phrase, input and result as well as the interactions between each phrase. All of this happens real-time as any of the data changes.
This would be wonderful if this only worked for complex crisp rule, but schematics go way beyond that and perform the same service for fuzzy rules and well as mixed crisp and fuzzy rules. If you have any questions about how fuzzy works and want to learn for yourself, spend some time with the schematic. You won't regret it!